Okay this is one I found was strange, not by who killed him, but how exactly he died. This happened in the town that I lived in and I remember seeing it on the news when it happened
http://www.laconiadailysun.com/newsx/local-news/99676-city-group-home-murder-prompts-lawsuit-812
The victim was 27 years old, the person who did it was 20.
How would having someone's legs around your neck for 10+ minutes kill you? Some people may think it would kill you by suffocating you by blocking your airway but according to new science (including ScienceDirect and Dr. Daniel Ruebens) we breathe through our ears, and without our ears, we'd suffocate and die. So the death could not have been suffocation since there's no mention of the victim's ears being plugged up. I can't get a hold of the autopsy report anywhere.