." >> reporter: dewan race is just 19 years old but he's already had to say good-bye to seven friends, each one murdered. and he's fed up. >> that's cold, bro. >> reporter: today he's paying his respects to two brothers buried in one plot, shot dead on the same day. he tells us he didn't cry when they died. but the tears are coming now. and something else. anger. >> what are you thinking? what are you feeling? >> pain, man. like real pain, bro. you know what i mean? make me want to act in violence. >> reporter: watch closely. grappling with an urge to avenge his friends' violent murders, dewan pulls out his phone. he's about to make a life or death decision, whether to call his boys and retaliate. >> have to sit back and i have to think whether to go left or whether to go right. >> five bullets came white mazda. >> a brother and sister shot to death in richmond last night. >> reporter: this potent mix of pain, anger, and teenagers with guns making dewan's hometown of richmond, california at one point one of the deadliest cities in america. here the streets are hunting grounds. corner