this is incredibly sad. could loneliness be a contributing factor?
This reminds of This American Life episode about a man who got off his medication and felt like there were trained assassins after him. He ended up causing a lot of damage, attacking cops, and being shot in the process (not deadly). Luckily we do have medication that can help with such conditions.
http://www.thisamericanlife.org/radio-archives/episode/579/m...