Blow, whose name is Kurtis Walker, had collapsed at a bus stop near the Westfield Topanga mall at about 9 p.m. last Saturday night, according to police. ... A mall security guard had seen a younger man yelling at an older man at a bus stop Saturday night, so the initial 911 call described the incident as a robbery. When LAPD officers arrived, they determined there was no robbery happening, but an argument between the 57-year-old man and his son, who is his twenties. As Officers Chris Vege and Calvin Hill, Jr., walked up to the group, the older man...