A West Los Angeles gangster who killed two people and tried to murder 12 others was warned by a judge to "stop smiling" during sentencing yesterday, but that didn't stop him from smirking and chuckling as one of the victim's mothers deplored his crimes in court. See also: Jose Zapien, West L.A. Gangster, Convicted for Murdering 2 Santa Monica Youths. The dark side of a longstanding rivalry between West L.A. and Santa Monica gangs played out in the sentencing of 25-year-old Jose Zapien, who headed west from his Sawtelle neighborhood to kill a 15-year-old high school football player and a...