On the 9th February of 1983 Detective Chief Inspector Peter J got a phone call about drain with what appeared human remains. According to Detective Peter J, they've found flesh and bones, those flesh examined by the pathologist and confirmed that it was human remains.
In April 1982 Carl Stata a 21 year old moved to a hostel in North London, one night he came in a gay pub in which Nelson already brutally murdered 13 men. While Carl is in the pub he met a man which sitted behind him and they were talk about their ex partners. According to statement of Carl, he is attracted to this man because he was so friendly to him.
After they talked they take into a taxi and went to an old house, Carl find the house had bad smell and it smells like an old age, but Dennis explain that they have dogs that why the smell is like an old age, Carl believes it, then they enter inside the house and drink alcohols while listening to music.
When he already drunk Dennis Nelsin help him to sleep in bed but he felt like he have been putted in a sleeping bag, when he was awake he realized that the sleeping bag is twisted around his neck, he saw Nilsen at his top and he presumpt that Nelsin is helping him but he found out that Nilsen is balling the sleeping bag tight and he became unconscious.
According to Carl he remember that he wake up in a cold water and Nilsen keep drowning him, he tried to pull out from water but Nilsen keeps drowning him, he's also weak and exhausted to fight Nilsen.
Nilsen brings the body of Carl into sofa, when the dog licked on face of Carl, Nilsen realize that Carl is still alive thats why he revives Carl with mouth to mouth resuscitation. After Carl revives, Nilsen explains to him that he was in shocked thats why Nilsen drowned him in the water. Then Nilsen invited Carl for a walk for 5 minutes but they've been walking almost an hour and Carl realized that Nelsin had intention to finish him off but he can't remember anything, he fell on the ground hopefully there's a man with a dog roaming around the forest. After that incident Nilsen brought Carl into train station then left him there.
After days Nelsin asked Carl to meet him but Carl didn't want to meet up again, he went to hospital to know what's happen to him. The doctor said that there's a person want to kill him based on mark on his neck. According to psychologist there are cases that those victims who had trauma can't remember the exact happen to them.
After few weeks Nilsen killed again but there's a man that survived from nightmare of Nilsen. Dennis Nilsen is a former Army Kirk and police in which he had a job in a office in which he met a lot of younger men and one of those is Martyn Hunter Craig, Martyn was convinced by Nilsen to treat the drink and Martyn find Nilsen as a good man since he makes a lot of jokes. After they drink they went back to Martyn house. On almost 2 years, the lust of Nilsen for killing didn't stop and he killed 11 men on that place. He buried those bodies in the garden then put it on fire, he also burned tires while burning the garden to disguise the smell of the decaying body.
Nilsen and Martin had a friendly relationship but Martin didn't know the dark secret of Nilsen even though they lived under one roof, until Martin decides to move in another place, thats why Nilsen burned those remaining bodies in the garden and clean all those traces. After they moved in another house, Nilsen got more victims, he had a problems in disposing his victims and those body parts are on his house. When Carl visited Nilsen, he smells like decaying body but when he trying to ask Nilsen, he just make laugh at him.
Nilsen was arrested because there's a phone call that Detective Carl received about a drain that contains human remains, when they've searched in house of Nilsen they've found out 3 decaying bodies hidden then bones hidden in cabinets. After they've arrested Nilsen and questioned him, he finally revealed his horrific murdering.