the other side, 14-year-old valentina peralta is fatally hit. her mother speaking through tears tuesday. she said her teenage daughter died in her arms while trying on a dress for upcoming christmas party. never should this 14-year-old girl end up as collateral damage at a shopping plaza. 911, what is the emergency. i hava cust in my store attacking customers. reporter: the moments leading up to tense exchange captured on body camera footage released by lapd. he s wrecking things. reporter: authorities say 24-year-old daniel lopez attacked multiple women in the north hollywood department store. alana lopez seen beating one person with a heavy duty bike lock. employees trying to warn shoppers inside. customers, evacuate.