He insisted barriers were secure, asking: 'Do you know any four-year-olds? They can climb over anything'

These are the parents of the four-year-old boy whose 15-feet fall into the gorilla exhibit moat in Cincinnati Zoo resulted in the death of 17-year-old silverback gorilla, Harambe.

Seen here for the first time is mother Michelle Gregg, 32, who has four children by father Deonne Dickerson, 36, a man who, Daily Mail Online can disclose, has a lengthy criminal history.

Criminal filings against Dickerson stretch over a decade and include burglary, firearms offences, drug trafficking, criminal trespass, disorderly conduct and kidnap.

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Mom and dad: Deonne Dickerson and Michelle Gregg are the parents of the four-year-old boy who fell into the gorilla enclosure housing Harambe on Saturday at Cincinnati Zoo

In 2006 he was sentenced to one year behind bars for a drug trafficking conviction.

But in numerous pictures posted on Dickerson's Facebook site in recent years he appears to have turned his life around to become the proud father of four.

Indeed, the majority of his postings to the social media site are updates of his children and his working life.

In others pictures he has uploaded his friends congratulate him and Michelle on the birth of their fourth child last January.

Together: Michelle Gregg and Deonne Dickerson at home

Cleveland based Dickerson is from Atlanta, Georgia and studied at Cuyahoga Community College, Ohio and now works as a sorter at a Cincinnati industrial equipment supplier.

Gregg is currently the administrator at a Cincinnati pre-school.

She has been the subject of sharp criticism following the incident that saw zoo staff shoot dead Harambe who, according to new video footage, may have been protecting rather than threatening the child after he crawled through a barrier and fell into the gorilla's enclosure.

Many social media commenters have criticized her and Dickerson and said they should be held accountable.

A Cincinnati police spokesman said no charges were being considered. A spokeswoman for the family said on Monday they had no plans to comment.

'I do think there's a degree of responsibility they have to be held to,' said Kate Villanueva, a mother of two children from Erlanger, Kentucky, who started the 'Justice for Harambe' page and attended a vigil on Monday at Cincinnati Zoo for Harambe.

'You have to be watching your children at all times.'

More outraged animal lovers took to social media declaring the western lowland gorilla's life was unnecessarily taken, and more than 290,000 have already joined 'Justice for Harambe' which place the blame squarely on the boy's parents.

Ian Redmond, the chairman of the Gorilla Organization, told CNN : 'When gorilla or other apes have things they shouldn't have, keepers will negotiate with them, bring food, their favorite treats, pineapple or some kind of fruit that they don't know and negotiate with them.'

Primatologist Julia Gallucci said: 'The gorilla enclosure should have been surrounded by a secondary barrier between the humans and the animals to prevent exactly this type of incident.'

A special zoo response team shot and killed a 17-year-old gorilla named Harambe to protect a four-year-old who fell in the enclosure. But new video footage shows the two briefly holding hands (pictured)

The clip shows Harambe standing guard in the corner of the moat (left, with the boy behind Harambe), and witnesses said the gorilla looked like he was trying to protect the boy from panicked bystanders (right)

The boy's mother wrote a Facebook post saying her son suffered a concussion and a few scrapes. She defended her role as a parent and called the incident an accident

Earlier on Sunday, police said prosecutors could choose to indict the parents, but Cincinnati Police Lieutenant Stephen Saunders later said he was not aware of any intention to do so.

Soon after the incident, Michelle Gregg, the mother of the boy, posted a message on Facebook saying: 'I want to thank everyone for their thoughts and prayers today. What started off as a wonderful day turned into a scary one.

'For those of you that have seen the news or been on social media that was my son that fell in the gorilla exhibit at the zoo. God protected my child until the authorities were able to get to him.

'My son is safe and was able to walk away with a concussion and a few scrapes... no broken bones or internal injuries.

'As a society we are quick to judge how a parent could take their eyes off of their child and if anyone knows me I keep a tight watch on my kids. Accidents happen but I am thankful that the right people were in the right place today.'

The family also released a statement on Sunday saying they had taken their boy home from the hospital.

It read: 'We are so thankful to the Lord that our child is safe. He is home and doing just fine. We extend our heartfelt thanks for the quick action by the Cincinnati Zoo staff.

'We know that this was a very difficult decision for them, and that they are grieving the loss of their gorilla. We hope that you will respect our privacy at this time.'

The zoo shot the beloved animal after he dragged the boy through the water and up out of the moat, but many say he was simply trying to protect the child

Deidre Lykins was also at the zoo when she saw the boy drop into the enclosure.

She described how Ms Gregg was calling out for her son and had just been next to him when he disappeared.

Then she had to stop her husband from going in to try and rescue him.

But she insists Ms Gregg is not at fault, and wrote on Facebook: 'This mother was not negligent and the zoo did an awesome job handling the situation!

'This was an open exhibit! Which means the only thing separating you from the gorillas, is a 15 ish foot drop and a moat and some bushes!'

This comes as new video footage of Harambe the gorilla suggests he was trying to protect a four-year-old boy who fell into the zoo enclosure just minutes before the 400-pound animal was fatally shot.

Many are placing the blame squarely on the parents of a four-year-old boy

The small child said he wanted to get in the water before the incident, to which his mother, who was also watching several other children, replied: 'No, you're not, no, you're not,' according to one witness

Some said Harambe appeared to be guarding and defending the boy, but video footage also showed him dragging the four-year-old in the water

The clip shows Harambe standing guard over the boy in the corner of the moat, and the two even share a brief moment holding hands.

Witnesses said the gorilla was acting protectively in the tense situation, which may have been aggravated by panicked onlookers who screamed as they watched from above.

Cincinnati Zoo Director Thane Maynard confirmed the boy was not under attack, but called it a 'life threatening situation' where the gorilla was 'agitated', 'disoriented', and 'behaving erratically'.

During a press conference on Monday afternoon, Maynard supported the animal response team's decision to kill Harambe, and said: 'Looking back we would make the same decision.'

The huge gorilla was about six times stronger than a man, Maynard added, and was confused and disoriented.

'This is an animal (that) with one hand, I have seen take a coconut and crush it,' he said.

The zoo said tranquilizing the animal was not an option because a dart could have startled the already-agitated creature, causing it to act aggressively before the sedative kicked in.

Maynard also insisted the zoo's barriers were secure, saying: 'We all need to work to make sure our families are safe. Do you know any four-year-olds? They can climb over anything.'

The incident, which was captured on a cell phone camera, has sparked an outcry of emotion, with thousands of mourners branding it a 'senseless death'.

A mother who was at the zoo said she tried to stop the child, who authorities believe crawled past the railing and fell 10 feet into the gorilla's habitat, where he spent more than 10 minutes.

Cheryl Flaherty, of Cincinnati, left, comforted a fellow mourner during a vigil outside the Cincinnati Zoo on Monday

During Monday's press conference, Maynard supported the animal response team's decision to kill Harambe, and said: 'Looking back we would make the same decision'

'I tried to prevent it, I tried to grab him and I just couldn't get to him fast enough,' Brittany Nicely told WHIO.

According to Nicely, the gorilla was acting protectively towards the boy and did not exhibit any threatening behavior.

A newly released video shows Harambe standing over the boy in the corner of the moat, appearing to shield him from the screaming crowd above.

The animal then dragged the boy by the leg, but the two shared a surprisingly tender moment when the four-year-old reached for Harambe's arm and the two briefly held hands.

According to the fire department incident report, the gorilla was 'violently dragging and throwing the child', WLWT reported.

But Nicely contradicted the account, saying: 'What the first responders saw, I'm just not sure...They said he was violently throwing the child around, which seems crazy to me.

'They have a picture of the boy sitting in front of the gorilla moments before they shot him.'

Harambe's death has sparked an outcry of emotion, with thousands of mourners branding it a 'senseless death' (pictured, Monday's vigil)

Some blamed the zoo for its response and questioned whether the exhibit should have been surrounded by more secure barriers

Kim O'Connor told WLWT she heard the boy talking about getting into the water before she heard a splash, followed by frantic yelling when onlookers realized he was inside the enclosure.

According to O'Connor, the gorilla looked like he was trying to protect the boy from panicked bystanders who may have aggravated the tense situation.

'I don't know if the screaming did it or too many people hanging on the edge, if he thought we were coming in, but then he pulled the boy down away further from the big group,' she said.

Harambe later dragged the four-year-old out of the moat before he was fatally shot with a rifle while the boy was still between the animal's legs.

The zoo director confirmed the gorilla did not appear to be attacking the child, but he described it as 'an extremely strong animal in an agitated situation'.

'You're talking about an animal that's over 400 pounds and extremely strong. So no, the child wasn't under attack but all sorts of things could happen in a situation like that. He certainly was at risk,' Maynard told WLWT.

But the zoo director insisted the barriers were secure, saying: 'Do you know any four-year-olds? They can climb over anything' (pictured, a boy placing flowers outside Gorilla World in the zoo)

The zoo's Gorilla World has been closed since Saturday, but authorities are hoping to reopen by next weekend. Flowers and commemorative notes were also left outside the zoo (pictured)

He added: 'We all need to work to make sure our families are safe' (pictured, a mother and a child visit a bronze gorilla statue outside the Gorilla World exhibit Monday)

During a press conference on Monday, Maynard said Harambe was 'behaving erratically', before adding: 'The child wasn't just being endangered, but dragged around by the ankle and hurt.'

He explained that tranquilizing the gorilla, which could have taken several attempts, would have left the boy in danger since the effect would not have been immediate.

He also said in a statement released Sunday: 'The impact from the dart could agitate the animal and cause the situation to get much worse.

'We are heartbroken about losing Harambe, but a child's life was in danger and a quick decision had to be made.'

He supported the zoo's dangerous animal response team for their decision to kill Harambe, and said: 'They made a tough choice and they made the right choice because they saved that little boy's life.'

During Monday's press conference, Maynard said he wasn't there to 'point fingers' but said: 'We all need to work to make sure our families are safe.'

'We're the ones who took the loss on this- you can trust me, a lot of people expressed concerns, but it doesn't affect anyone as much as the people at the zoo.

'This is a very big loss to the zoo- not just an emotional loss, but a loss to a key conservation and breeding program.'

Brittany Nicely (left and right) said she tried to stop the child from going into the enclosure but couldn't grab him in time. She then tried to calm the boy's mother has the chaos unfolded

The zoo celebrated Harambe's birthday on Friday, just one the day before he died (left). Many questioned whether the zoo could have used a tranquilizer first, but Maynard said it could have had the opposite effect

On Monday, the zoo director insisted the horizontal barriers were secure and said: 'We take safety very seriously and we are keenly interested in improvement.

'Any of us could climb over barriers if we choose. As I said, you can lock your car or lock your house, but if someone wants to get in, they can.'

He cited the incident last week in Chile, where a man with a suicide note in his pocket stripped down and broke into a lion enclosure at the Santiago Zoo where he was mauled before two of the animals were shot dead.

The animal response team at Cincinnato Zoo had practiced drills and 'table top discussions' after the incident, without realizing they would be facing a similar scenario on Saturday.

While safety measures are being evaluated, Maynard said the gorilla exhibit is expected to reopen next weekend without citing specific security improvements.

Harambe (right) was raised at the Gladys Porter Zoo in Brownsville, Texas (left) before he was moved to Cincinnati in 2014. He is a western lowland gorilla, which the World Wildlife Fund deemed critically endangered

Zoo director Maynard noted it was the first time the team had killed a zoo animal in such an emergency situation, and he called it 'a very sad day'.

He said said in a statement: 'The Zoo security team's quick response saved the child's life.

'We are all devastated that this tragic accident resulted in the death of a critically-endangered gorilla. This is a huge loss for the Zoo family and the gorilla population worldwide.'

Jerry Stones, who worked at the Gladys Porter Zoo, in Bronwsville, Texas, where Harambe lived before he was transferred in 2014, said he was devastated by the news.

Stones, who raised the gorilla, told the NY Daily News: 'It tore me a new one. An old man can cry, too. He was a special guy in my life. It's a sad day for us.'

He added: 'He grew up to be a pretty, beautiful male. He was very intelligent. His mind was going constantly. He was just such a sharp character.'

Western lowland gorillas are deemed critically endangered by the World Wildlife Fund, but Maynard said Harambe's death would not be the end of his lineage, since viable sperm was stored at the zoo.

Gorilla World has been closed since the incident on Saturday, although Maynard said it was expected to reopen by next weekend. The rest of the zoo has been open as usual.

In March, two curious polar bears at the zoo wandered into a behind-the-scenes service hallway through an open den door, but never left a secondary containment area.

The zoo said the 17-year-old female Berit and the 26-year-old male Little One, entered an 'inappropriate' area but remained contained and were never loose or a threat to the public.