Los Angeles police have identified the suspect wanted in the fatal stabbing of UCLA grad student Brianna Kupfer, who was brutally slain at her job in a luxury furniture store. Shawn Laval Smith, 31, was named by LAPD on Tuesday night as the suspect captured on video in chilling footage as he calmly purchased a vape pen from a 7-Eleven 30 minutes after the cold-blooded murder. 'He should be considered armed and dangerous. If seen do not approach, call 911,' police said in a statement. Los Angles County Sheriff's Department records list Smith as currently free on a $1,000 bail...