LOS ANGELES — Los Angeles event promoter David Pearce, who booked mainstream and adult talent at nightclubs, was arrested along with two other men on suspicion of manslaughter in connection to the deaths of two women, 24-year-old model Christy Giles and 26-year-old architect Hilda Cabrales Arzola, who were allegedly given an overdose of drugs while partying and dropped off at hospitals by masked men last month, according to an LAPD report released today.