Police are looking for a man named John Lee Cowell a suspect they say stabbed two women at the MacArthur BART station.
18-year-old Nia Wilson was killed in the attack, which appears to be a random crime.
Police are now actively searching for Cowell & if you see the man you should call 911 or reach out to police's anonymous tipline at 510-464-7011.
Photos below are supplied by BART the most recent one being the one in the hat.
There also will be a vigil held today at MacArthur BART from 4p-7p