Prosecutors have dismissed a manslaughter case against Oregon mother Nicole Engler, 38, whose baby Remington died after she was forgotten in a hot car on June 21

Prosecutors have decided to drop the manslaughter charge against a mother who accidentally killed her toddler daughter by leaving her in a hot car, thinking she had dropped her off at daycare.

Investigators said they found no evidence that Oregon mother Nicole Engler, 38, was aware that her one-year-old daughter Remington Engler was still in the car when she died on June 21, the Douglas County district attorney announced on Monday.

Engler decided to drop Remington off at daycare, something her husband who works as a night shift EMT usually does, but she did because he was still sleeping that morning.

However, Engler said she forgot to drop off her toddler at daycare and drove straight to the office. It wasn't until after the workday that she discovered her child unresponsive in the back of the car in the 80-degree heat.

'I recognize that reasonable minds may differ on whether criminal charges should be pursued,' District Attorney Richard Wesenberg said on Monday. 'But I have made my decision based on the totality of the evidence that is available to me, the limits of Oregon law in this matter and the likelihood a conviction can be obtained.'

Engler and her husband struggled to have children for 15 years until she gave birth to Remy - her 'treasure'.

Engler's case was dismissed on Monday and a district attorney said she did not leave her one-year-old daughter Remy in the hot car out of criminal neglect. Nicole and her husband Peter (above left) tried to conceive for 15 years before Remy was born

Video courtesy of KPIC Oregon

On June 21, Engler returned to her blue Honda CRV hours after arriving at Evergreen Family Medicine, where she works as a pediatric nurse.

She drove to get coffee from a shop nearby, oblivious to the child in the car and even told baristas in the coffee shop that her daughter was at daycare.

After work at 4pm she headed to the daycare and realized her child's unconscious body was in the car. Engler was taken into custody at 4.30pm in Roseburg, Oregon as cops said neglect may have been the cause behind the child's death.

The Douglas County Medical Examiner’s Office said she died of hyperthermia – a condition where the body overheats - and ruled her death an accident.

The heartbroken mother was charged with manslaughter, leading her to beg police to let her kill herself.

On Monday, District Attorney Wesenberg announced the charge would be dropped as Engler wasn’t impaired on that fateful day and Remington was 'loved and cared for in every way a mother and a father could', according to Oregon Live.

He added that the backseat mirror in the SUV wasn’t properly adjusted to reflect Remington in the car. The car also had tinted back windows and the baby sat in a rear-facing car seat.

He even consulted a state psychiatrist who determined Engler’s actions were not out of criminal negligence.

Furthermore in Oregon, the law doesn’t specifically address children who die after being left in a hot car. States that do prosecute child hot car deaths have to prove the acts were done intentionally.

Engler hung her head and clasped her hands together during her video link appearance in court in June. She was released on bond afterwards and her manslaughter case was dismissed on Monday

The woman's grieving husband Peter is pictured in court as she appeared via videolink

Peter slumped during a court appearance back in June upon hearing the charge against his wife

Engler’s attorney David Terry said she is 'ecstatic and relieved' to learn that the second-degree manslaughter accusation will be cleared. He added 'losing a child was punishment enough'.

'It's difficult enough just to deal with the tragic loss of your only child, but to do so against the back drop of not knowing whether you're going to be indicted, taken to trial and lose your freedom for the next 10 years, this has all been very, very hard for Nicole and her family,' Engler's attorney David Terry said.

Suicidal and pulling her hair out in clumps in a s*** smeared, padded iso cell in the Douglas County Jail, with screaming schizophrenics on either side, she begged to be allowed to take her own life David Terry, Nicole Engler's lawyer

Engler returned to work as a pediatric nurse last week but has been mostly restricted to desk duty.

The Oregon State Board of Nursing had initially asked Engler to voluntarily surrender her license following her arrest. They negotiated that she stop practicing until the case was resolved and now Engler hopes to return to full duties as a nurse.

After Remington's death, David Terry wrote an open letter pleading for the charges against Engler to be dropped, describing the mother's anguish and heartbreak.

He described how she was pulling clumps out of her own hair and begging to be allowed to kill herself because she was so distraught.

'Suicidal and pulling her hair out in clumps in a s*** smeared, padded cell in the Douglas County Jail, with screaming schizophrenics on either side, she begged to be allowed to take her own life,' he wrote in the open letter.

He added that she suffered a 'memory lapse' at the time of the incident.

Two funds were set up in the wake of the tragedy in June.

One was in Remy's memory and allows mourners to give a donation to Oregon's Wildlife Safari. The second was a bank fund to help Nicole with her legal fees. It is at Umpqua Bank and is listed under the Engler Family Benefit Fund.