Jurors heard from a California Highway Patrol Officer about the time he warned socialite Rebecca Grossman, who is on trial for the murder of two boys killed in a car crash, about the dangers of speeding while giving her a ticket in 2013. Robert Leffler said under oath that he stopped Grossman doing 92 mph on the 101 Freeway in Agoura Hills that March, RadarOnline.com has learned. “She apologized; her husband was called into work, and she was dashing to get her children,” Leffler shared about how the interaction started. After giving her the ticket, Leffler said he informed her about the danger…