Well, as I posted in the "what's going on in your fort" thread, I've recently had a murder.
It all started because an unhappy new recruit didn't like being drafted for service whilst hungry and thirsty, and decided he needed to be the first to engage a zombie. So he pretty quickly got angry and went to see the mayor as soon as I cancelled orders for his squad. The mayor, then, was a seven-year-old girl due to a little modding. She decided she didn't want to be yelled at tonight and that she'd much rather go to bed, at which point the angry soldier, only 5 years older than her, walked into her bedroom and axed her to death in her sleep. This didn't sit well with him on account of his having never witnessed death before, so he was even more pissed off and went to take out his anger on another seven-year-old: the new mayor, cousin and friend of the old mayor. Before they had their meeting, the new mayor had to shuffle down to his office, barely a doorway separating him from the corpse of the old mayor, and deconstruct something I had designated prior. He then interrupted the meeting again to go clean up all the blood around the corpse of his loved one, seemingly blissfully ignorant of her presence there. The meeting then concluded with the recruit only slightly less pissy than before, and they went about their business.
About week later I actually got the announcement that Urvad, the ex-mayor, was found dead in her bed with an ☼axe☼ in her head. This of course resulted in everyone getting pissy once more, including the recruit. He was pissed because the mayor was his personal friend. He then attacked one of the other soldiers and beat up a prized laying turkey hen.
I did remove him from military service and convict him for the murder, which abated a tantrum spiral because everyone was pleased that the murderer had gotten what he deserved (a huge chunk of the fortress population was related to Urvad! Cousins everywhere!). He's now serving 200 days in prison, awarded by the CoG, Urvad's father.