ABOUT POST
Nia Wilson was standing on a Bay Area Rapid Transit station platform in Oakland, California, Sunday night when she was stabbed to death in an apparently unprovoked attack.
By Monday night, John Cowell, 27, had been arrested in connection to the stabbing, but days later, officials still haven't said what prompted the attack, which a police chief compared to a "prison yard assault."
The random murder of Wilson -- a black teenager described by her family as loving and selfless -- prompted nearly 1,000 people to march in Oakland in a vigil for Wilson early this week, according to an estimate by the Oakland police.