Having recently watched, Making a Murderer, let's let the facts come in. In my mind, there is a HUGE difference between some nerdy, virgin xc runner meeting up with a teen girl , who snuck out of her parents house to hookiup and then happens to die because she didn't take her liver medication which he dind't know about and flat out hacking some girl to death.
Cops are known to overcharge.
This could be some sad case of a nerd thinking he was going to get lucky with a fellow teenager he met on facebook only to haver her die on him because she didn't take her liver medication/