Rebecca Grossman, co-founder and chairwoman of Grossman Burn Foundation, was arrested on suspicion of DUI and vehicular manslaughter in connection with a fatal crash late last month in Westlake Village. The accident killed two children: brothers Mark Iskander, 11, and Jacob Iskander, 8. Officials at the Malibu/Lost Hills Sheriff’s Station are looking into the possibility that speed and alcohol were factors in the crash, reports said, and that Rebecca Grossman attempted to leave the scene. Rebecca Grossman is the wife of Dr. Peter Grossman, medical director of Grossman Burn Centers Inc. in West Hills. The foundation she chairs is the philanthropic arm of the burn centers. She is also chief executive of Powerhouse Lux Media, which in the past published Westlake magazine.