I used to hang around with a girl and boy for many years, separately. The girl went on to have a child so never seen her that much after that. The boy was someone I spent a lot of time with within a friendship group, he was in to drugs but I'd never seen a side to him that would make anyone wary, he was known as a nice guy. Then the girl and boy I've spoken about ended up in a relationship, 2 years later the girls son passed away aged 3. It was something that haunted me, I felt so so sorry for her losing her child like that. The whole community rallied around them both for months, everyone was under the impression he'd fallen down the stairs when in actual fact, the man had abused the child for months, she knew about it and it turned out the little boy was murdered and she tried to help him cover it up. That poor poor child. The whole town was in complete shock especially after so much money was raised through fundraisers for her, to help her through her grief. It's not something we will ever forget, he got 24 years, she got 18 months which was extended to 2 years but is now out living her life as a lesbian. Her facebook is like a shrine to her son, evil inside and out.
I also went to school with 2 boys and a girl who ended up beating a man to death outside a pub.