Police have released chilling surveillance footage that shows Craigslist killer Brady Oestrike setting up a 'sex torture dungeon' where he kept an 18-year-old girl chained for five days before killing her.

Investigators in Wyoming, Michigan, also unveiled more than 100 photos from inside 31-year-old Oestrike's gun-littered house of horrors on Wednesday and confirmed that video of Brooke Slocum's gruesome strangling also exists.

On July 12 of 2014, Brady Oestrike kidnapped Slocum - who was eight-months pregnant - after agreeing on Craigslist to meet her and her boyfriend, Charles Oppenneer, 25, for sex.

He then decapitated Oppenneer in the park, handcuffed Slocum and took her back to his home in the early hours of July 13 where he kept her in a dog kennel and sadistically abused her.

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Chilling surveillance footage of a Craigslist murderer, Brady Oestrike (pictured), shows him setting up a cage where he tortured Brooke Slocum. He kidnapped her on July 12 and surveillance cameras recorded him sadistically torturing her for five days and then killing her on July 17

Slocum - who was eight months pregnant - was repeatedly assaulted, tortured and forced to smoke marijuana over five days. Oestrike turned off the cameras about 1 p.m. on July 17

In the video, Oestrike is seen preparing a dog kennel, trying out ropes and chains, laying out bowls of water and walking around with handguns in the videos.

Wyoming Police Chief James Carmody revealed that Oestrike, who he described as a gun fetishist, had hoarded whips, swords and bondage tools inside his home.

Police recovered a 'sex slave contract,' stuffed toys tied with handcuffs and blood-covered panties.

'We always try to find a reason for someone acting like this. Sometimes there isn't one.' Wyoming Police Chief James Carmody

The contract was written by hand and involved sickening clauses such as 'I must obey my master' and 'pleasure, I must earn it'.

They also found dozens of restraints, ropes, sex toys and cattle prods strewn across his dilapidated home.

In addition they recovered a medieval mask and chainmail gloves, medical gloves and syringes

And in a another disturbing twist, officers who collected evidence from Oestrike's home found a child's sippy cup, a baby doll with a noose and suitcases filled with women's clothing.

But they saw no evidence of any children inside the property.

Police also called in the FBI when they discovered a map of the US hung on Oestrike's wall - covered from coast to coast in push pins.

Authorities panicked and thought they were dealing with a serial killer, but a former girlfriend told them that the pins represented places where he had stored food in case of the apocalypse.

Charles Oppenneer was found decapitated in Gezon Park. His head was never found. Brooke Slocum (right) was found strangled after undergoing at least five days of torture. In one video she was shown with handcuffs on at 1am on with a chain around her neck

Slocum's roommate told police that the pair had been posting Craigslist ads for 'sex for cash' at the time. A conversation dated for July 12, 2014, between Slocum and a person identified as 'Hard Mike' was discovered by police and led them to Oestrike's (pictured) Facebook page

Surveillance footage from cameras Oestrike installed into his home show him cleaning a room before the murders. In this clip from a video, ropes can be seen hanging from the ceiling and lying on the floor

The disturbing video - which has audio - was recovered from four cameras that Oestrike had set up across his home.

The first dated surveillance footage that police released show him cleaning a room in May 2014, in apparent preparation for a murder and abduction.

It shows the same dog kennel cage that Slocum was imprisoned in and the various chains and restraints that Oestrike used during her torture.

Video that police have said they will never release shows the depraved torture that Oestrike put Slocum through.

One of these videos is time-stamped 11 p.m. on July 12, 2014. This is one hour before he went to meet the Oppenneer and his pregnant girlfriend.

He also walks by with a chain and padlock and lays out underwear.

Slocum's arms were also attached to a pulley system suspended from the ceiling, one of the videos revealed. She was repeatedly assaulted, tortured and forced to smoke marijuana over several days

Disgusting: This is the dog kennel that Oestrike kept Slocum trapped inside for five days before killing her

Restraints: The home-made pulley system that Oestrike tied Slocum to is seen in this picture. Her arms were both attached to ropes that allowed him to pull them up and down like a puppet

Planning: The box the dog kennel training crate arrived in can be seen in the left of the picture

Suitcases: Police revealed that they found blood-stained women's underwear and other female undergarments in Oestrike's home

Slocum is first seen on Oestrikes depraved video being dragged into his Taft Avenue house with handcuffs on at 1am on July 13.

According to the police reports he wrapped a chain around her neck that had been bolted to the bathroom floor and forced her inside a dog cage.

Her arms were then attached to a pulley system suspended from the ceiling - which he could manipulate at will - controlling her like a puppet.

Slocum is then seen to be repeatedly assaulted and forced to smoke marijuana for several days, the documents show.

The video appears to show Oestrike convince Slocum that Oppenneer is still alive before he kills her.

Panic stations: Police in Wyoming, Michigan called in the FBI when they found this map dotted with pins from coast to coast. An ex-girlfriend told police that they were markers where he had dumped food in case of the apocalypse

SORDID CRAIGSLIST MEETUP THAT LED TO DOUBLE MURDER

Police revealed the Craigslist messages between Charles Oppenneer and Brooke Slocum and Brady Oestrike that led to their deaths. On July 2, 2014, Brooke Slocum posted a desperate plea for money to Facebook, asking for help to pay bills. Sex trafficked: Brooke Slocum's family claim she was forced into meeting Oestrike for sex because she had been forced into prostitution The 18-year-old wrote on Craigslist: 'I need $50 by 330pm today. I can pay you back later tonight but I need gas and some mess (sic) quick! Everyone has bronchitis at my house and I do not want to get sick! I'm 8 months pregnant and my lungs are all squished as is... If you could help me and my daugher will greatly appreciate it!' This went unanswered until Brady Oestrike replied under the user name 'Mike's Hard' to say that he could 'host' her and asked what she was thinking. Only ten minutes later Slocum wrote back to Oestrike saying: 'Uhmmm well we are looking for donations if possible. kinda in a tight spot and we have a baby on the way. As far as the funn goes though there won't be any male on male action.' In response to this, Oestrike said that he could pay $120 and offers to pick them up, which Slocum declines. Perverted: Brady Oestrike chose Gezon park to meet kidnap and ultimately kill both Brooke Slocum and Charles Oppenneer and told them there was no police presence there during their Craigslist chats Oestrike then suggests Gezon Park at 11.30pm - which also appears to unnerve Slocum: 'hmmm..I dunno..I don't wanna get in trouble for indecent exposure or anything... I can't go to jail being 8 months pregnant.' In their last exchange before agreeing to meet at around midnight in the park, Oestrike tells her that 'It's a cop free park with lots of woods.' Advertisement

The autopsy carried out on Slocum revealed that her cause of death was strangulation.

The footage is so stark that the Wyoming Police Chief James Carmody called the case 'one of the most brutal' he had ever seen.

Prepper: Brady Oestrike believed that the end of the world was coming and hoarded food and supplies across the country

'I think it was pure evil from start to finish,' he added, saying that officers who discovered the torture video had to go through counseling afterwards.

'It definitely had a profound effect on all of us,' he said to MLive. 'It's very disturbing. There's no way you can say that you get used to that stuff, because you don't.'

'We always try to find a reason for someone acting like this' he added. 'Sometimes there isn't one.'

Until police released the video on Wednesday it was not clear to the public how long Slocum had been held captive.

In one of the released videos, Oestrike is seen walking back-and-forth in a room containing the empty dog kennel.

As he moves things around, ropes can be seen hanging from the ceiling and lying on the floor.

Police apprehended Oestrike on July 17 after a high speed car chase ended with him taking his own life by shooting himself following a crash.

The videos show Oestrike's home (pictured) where Slocum was held captive

Oestrike led police on a chase in a yellow car before killing himself after he crashed into a railing (pictured)

Slocum's body was found inside the trunk. She had been strangled and her baby did not survive

TIMELINE OF CRAIGSLIST MURDERS July 2nd, 2014: Charles Oppenneer and Brooke Slocum post original Craigslist ad asking for cash July 12th, 2014: Brady Oestrike responds and suggests that he will pay them money for sex July 12th, 11.30pm: This is the last time that Oppenneer and Slocum are seen alive Midnight on July 13: Brady Oestrike meets Slocum and Oppenneer in Gozen Park and kills Oppenneer and beheads him with a long knife. July 13: Witnesses said they saw a man looking into what police later discovered to be Oppenneer's car. July 16: A body is discovered disguised with branches in the park. July 17: Police confirm the body is Oppenneer's and launch a frantic search for Slocum. July 17 at 1pm: Oestrike unplugs the surveillance video that was recording his torture of Slocum. July 17 at 4.45pm: Police realize that the last person to speak with the missing couple was Oestrike and a tactical team is deployed to his house while they wait for a search warrant. July 17 at 9.15pm: Oestrike is stopped by police fleeing his home and leads them on a chase. July 17 at 9.45pm: Oestrike crashes his car and shoots and kills himself. Moments later police discover Slocum's body stuffed in a suitcase in the trunk. Advertisement

Slocum's body was found in the trunk of Oestrike's car inside a suitcase. Her baby who she had already named Audi did not survive.

Oestrike worked as a lineman for a power company.

On July 13, 2014, police said they received a tip from a woman who reported that there was a man in a white mask looking into vehicles near the park where Oestrike had killed Oppenneer.

Around the same time, another person turned in Oppenneer's wallet that was found on a dirt road near the Gezon Park.

Officials also contacted Oppenneer's parents.

That same day, police found the empty car that was registered to Oppenneer in the area, according to the unsealed and released documents.

Authorities tried to contact Oppenneer after the vehicle was unmoved for two days.

Police then searched the area near the car on July 15 and smelled a 'faint odor of decomposition'.

The next day, authorities continued the search and found Oppenneer's decapitated body in the woods.

His head has still not been found.

Police then obtained search warrants for the couple's cell phones.

Slocum's roommate told police that the pair had been posting Craigslist ads for 'sex for cash' at the time, according to the recently released documents.

A conversation dated for July 12, 2014, between Slocum and a person identified as 'Hard Mike' was discovered by police.

They were planning to meet at Gezon Park for sex, the documents show.

Oppenneer's car (pictured) was found near Gezon Park on July 13. Authorities tried to contact Oppenneer after the vehicle was unmoved for two days

Terrifying: The fantasy fan kept such a wild array of weapons it bewildered police

Outlandish: The only part of Oestrike's home that has any semblance of order is his bullet rack while police claimed he kept knives stuffed down his chairs in case of attack

Firearms: Among the many weapons police found was this - possibly styled to resemble a golden gun

Armed to the teeth: A semi-automatic weapon sits among plastic chairs while a broadsword and cattle prod are racked up

Police were able to link the Craigslist profile to a Gmail account, which led them to a Facebook user by the name of 'Joat Amos', who turned out to be Oestrike, according to Fox.

Oestrike was briefly stopped by police on July 17 near his home.

Dashcam video shows him speeding away from police in a yellow car.

He led them on a short pursuit before crashing at Burton Street SW and US-131 and killing himself.