US police have released disturbing footage of Craigslist killer Brady Oestrike casually preparing his torture chamber ahead of the 2014 murders of a pregnant teen and her boyfriend.

CCTV vision taken from inside Oestrike’s specially fitted room at his Wyoming home showed the 31-year-old preparing guns, ropes, pullies and a dog kennel ahead of him kidnapping eight months pregnant Brooke Slocum, 18, and her boyfriend Charles Oppenneer, 25.

The young couple disappeared on July 12, 2014 after responding to Oestrike’s ad on Craigslist to meet for sex.

Brooke Slocum and her boyfriend Charles Oppenneer were murdered by Brady Oestrike. (Source: Supplied)

Oestrike beheaded Oppenneer and then spent five days torturing and assaulting Slocum before killing her.

Police eventually tracked the serial killer to his home after he dumped Oppenneer’s body in nearby woods.

Brady Oestrike built an elaborate torture chamber in his home. (Source: Supplied)

He was killed in an ensuing police chase.