denise louis at 3:45. at 4:10 kevin wong. all of the dead had multiple gunshot wounds. >>> 75 diners, many of them tourists were in the dragon restaurant when three masked gunmen rushed in and opened fire. the gunmen were members of the joe boys trying to retaliate against members of two gangs for a killing earlier that year. >> they really wanted to get everybody at one time at one place. i mean just seize power. >> they thought they were going to wipe out the leadership. >> definitely. they thought they were going to wipe out most of the hot sing boys and the wachang gang we believe they were all there. >> reporter: but they weren't. there were 16 innocent victims. five dead, 11 seriously injured. a dozen people were eventually sent to jail for their roles in the massacre. san francisco police quickly created a special gang task force to deal with the growing gang problem in san francisco's china town. >> while some of the older gangs have withered away. merchants say younger gangs are taking over. >> this the communities k

louis this mom is so desperate to protect her family she's willing to break the law. >> technically this is illegal for you to have. >> yes. >> reporter: denise keeps those viles filled with narcam in her dresser. injected into a muscle it can reverse an overdose. >> if they are laying on the floor dead i am going to save their life. >> reporter: they are her sons ben and ryan both living with her, both heroin addicts sleeping in the rooms they grew up in. denise sent them to rehab but relapsed. ben is in treatment because he's young enough to be covered by his dad's insurance. he's been clean for two months. but ryan can't afford treatment and is still struggling. >> for some of us we have no idea what the attraction is. what does it feel like. >> like everything is all right. a warmth. that's what it feels like. it's just call. ing. >> reporter: it's so easy to get addicted and so easy to overdose. that's what scares denise. >> ryan said he lost five friends. you probably knew their moms. >> i can't even drive by their houses. because i know my kid could be next. >> reporter: they've had close calls before. a couple of years ago denise had

louis this mom is so desperate to protect her family, she's willing to break the law. technically this is illegal for you to have in the state of missouri. >> yes, it is. >> denise, who askedr last name, keeps those viles on a dresser. injected into a muscle and it can instantly reverse an overdose. >> if they're laying on the floor dead, i'm going to save their life before the ambulance can. >> they are her son ls. ben and ryan. both of them living with her. both of them heroin addicts, sleeping in the rooms they grew up. denise sent them to rehab, but they relapsed. ben is in treatment because he's young never to be covered by his dad's insurance. he's been clean for two months. >> some of us have no idea what the attraction is? what does it feel like? >> like a warmth. like everything is all right. you don't think about anything. it's just calming. >> it's so easy to get addicted and so easy to overdose. that's what scares denise. >> ryan said he's lost five friends. >> yep. good friends. >> and you probably knew their moms. >> i can't drive by their houses. because i know mine could be next. >> they've had close calls before. a couple years ago denise had to take ryan