Crowded conditions can lead to violence. Although these incidents happened in a state prison in California, overcrowding in any jail or prison is a condition that could lead to violence.

From the LA Times:
http://www.latimes.com/news/local/la-me-prison27jan27,0,3590654.story?coll=la-headlines-california


2 Inmates Killed in Lancaster
Some prisoner rights activists say crowding may have been a cause of the deaths.

By Amanda Covarrubias, Times Staff Writer

Two inmates have been slain over the last three weeks inside a cellblock at the Lancaster state prison, renewing concerns about overcrowding at the institution.