up next on a second look, the long criminal history of raymond "shrimp boy" chow arrested with leland yee. and rivalries in china town including the infamous golden dragon massacre. and ed yu speaks about the crimes before he would be charged in those crimes.

the fbi's recent arrest of state senator leland yee and five other defendants have refocused attention on someone who has had criminal complaints, "shrimp boy" chow. the golden dragon massacre in 1977 is also one of his crimes. members of the rival joe boy's gang came in and opened fire. they killed five people and wounded 11 others. none of the gang members. here is the report at that time september 4, 1944 from ktvu's mike o'conner. >> about one minute the ammunition is spent. and the floor was full of dead and dying. the people who were not hit were in terror. some were cowering behind

chairs even after police arrived. ambulances filled body bags and went back for more. this was a massacre. one of the victims was celebrating his college graduation up from los angeles with buddies. he found himself in the middle of horror. >> they were all around us. there were four of us sitting at the table. three of us were hit. the bullets were coming in our direction. to the left of me i know later on died. a person in front of me was very badly wounded. i was very fortunate that he just missed a major artery in my leg. i have a flesh wound right now. i consider myself lucky. >> the hospital staff was losing the battle for lives and working on death certificates. donald quan died at 3:35. 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 keep on changing and lee it's in constant motion. >> reporter: in may 1990, another shooting police say was gang related erupted near china town. police said the shooting was part of an ongoing power struggle involving the waching gang. >> reporter: there was so many

gunshot wound victims that paramedics had to make a hard decision. who to rush to the hospital first. one man 37-year-old michael ching gu was shot dead. seven others were wounded in what police call a gang ambush. the victims were all leaving the purple onion nightclub where china town meets north beach. police say the victims who all knew each other were climbing into two different cars about a block apart when two gunmen one in each car started firing simultaneously with semi automatic weapons. >> they knew the people were in the nightclub. apparently they knew where their cars were and they waited for them to come out. they watched them separate and go to their cars. they shot the groups of people at the same time.

>> reporter: doctors at mission emergency hospital say most of the victims will recover. but margaret lee is in critical condition with gunshot wounds to the stomach and hip and she is four months pregnant. the suspects described in their 20s are probably in the waching gang. >> there was a particular vehicle that was shot up. possibly involved in those shootings. >> reporter: still to come on a second look, how police say the shooting outside the purple onion would eventually lead to the killing of another gang leader and the arrest of "shrimp boy" chow. and what led to the rise of chow in an organization known as the free nation.

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in 1991, gang violence

erupted again in china town. someone shot and killed 35-year- old danny wong. he was reputed to be the leader of the wa ching gang. his killing was believed to be part of a cycle of violence and retaliation. >> reporter: some of it you could see. most of it you couldn't see. there was a funeral at san francisco china's town this afternoon. most of the police here were undercover officers. members of the gang task force attending the funeral of danny wang. the officers were not here out of respect. they were here as part of the police chief's new plan to have task force officers and not homicide investigators solve the killing and head off further gang warfare in china town. wong was the leader and one of the oldest members of the well known gang. wong was killed a week ago in a

diner slightly injured in the foot as wong was getting into this car. nine shots were fired, four hit wong. a shot went through the front door of this restaurant and hit the diner inside. gang experts believe the killing of danny wong may be in retaliation for this shooting back in may. a 37-year-old man was killed, seven people were wounded. that shooting was in retaliation for another killing the month before. >> there's a struggle between gangs or within a gang or something like that and it doesn't take a genius to know that there's going to be more. so we've got to stop it. >> reporter: danny wong's funeral procession wound its way through china town ending up at the spot where he was killed.

while the band played mourners lit incense and put out items for wong to use in his afterlife. the spot happens to be just across the street from the side of the worse gang violence in san francisco history. the golden dragon restaurant where in 1977 five innocent diners died in a spray of bullets intended for the waching gang. >> although no one was ever prosecuted for wong's killing, police believed it was part of a power struggle between wong's waching gang and a second gang. police would arrive 15 people they say were members of wo hop

to. >> reporter: san francisco police say china town is different. police say they removed the fear in the chinese community by arresting 15 members of the reknowned gang wo hop to. >> hopefully it will discourage young members not to join these organizations to be used and manipulated. >> the hop sing which the young people arrested this among belonged to. recruited young males some as young as 13 years old. >> reporter: the oldest raymond "shrimp boy" chow. already in jail on drug

charges, chow now faces charges of child molesting, and running a human trafficking ring. >> the girls came from the los angeles area. they were flown to san francisco and worked -- were brought almost need -- immediately to the house to start working. >> reporter: robbing the owners of this korean restaurant and robbing the residents of a sunset district home. the arrests of the gang will not put the gang out of business but -- >> we think it will put a serious blow to the gang.

>> reporter: that's when danny wong the leader of the rival waching gang was shot getting into his car. >> when we come back on a second look. how a 2006 homicide led to raymond chow's rise to the head of the powerful organization of the organization known as the chinese free masons. and how a member of the san francisco council came to spend time in prison.

tonight on a second look. crime in san francisco's china town and one of its central figures over the last four decades raymond "shrimp boy" chow. chow is one of the 20 people authorities recently arrested along with state senator leland yee. chow had said he was no longer a criminal but a civic figure head of the hong tong also known as the free masons.

he became head of that organization in 2006 after someone shot and killed his predecessor who was also head of the hop sing tong. >> reporter: it does not appear to be a random act. >> reporter: the shooting happenedded yesterday afternoon inside of leong's business on jackson street in china town. investigators say a gun man walked in, yelled robbery and promptly shot leon numerous times. but investigators say they don't believe robbery was the motive. leon's death made news in if chinese newspaper. >> some individuals don't need to talk too much and they carry a big stake. i think he may be following that parameters. >> leon was an elder and task president of a business and fraternal organization that

dates back to the 1500s. an organization that settled disputes in china including using violent tactics. today representatives from taiwan paid a condolence call to the hop sing office. >> they're so sincere, and over the community affairs. >> reporter: as san francisco's china town prepares for the upcoming lunar new year parade, this store front on jackson street remains closed. as it has been for most of the time over the past year. it was inside this business last february that allen leong one of the most powerful if -- powerful figures in china town was gunned down. >> leong was at work with his wife i guess by his side when the suspect came in and shot

him. >> leong's funeral brought out hundreds of mourners. >> he was a tough leader. very strong. he would say, put his foot down and people listened. >> reporter: leong had had problems of younger members of hop sing who had been seeking money from the organization. and there's reports that leong went to police saying he feared for his life. >> the department has gotten several leads in the case. san francisco police inspectors have traveled to new york and worked in cooperation with the nypd in following up a lead. they've had leads from all over the country. >> reporter: police have released a composite sketch.

there's a reward leading to the killer's arrest and conviction. $100,000 from the city. and .25 of a million dollars more from the hop sing tong. the saga of ed yu. how the man who followed yee ended up behind bars. lub card, the safeway app and gas rewards. this week,... ... life's just a little sweeter with delicious red, seedless grapes. just $1.99 a pound. clean up with bounty paper towels, only $8.99 for 8 large rolls. and honey bunches of oats are just $1.88. there's more savings to love... ...at safeway. ingredients for life.

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tonight on a second look we revisit some of the criminal figures surrounding leland yee who was arrested last month on corruption charges. one of those is a man who followed yee. ktvu's rob roth followed the case when yu pled guilty and was sentenced in 2009. >> reporter: inside a federal courtroom yu admitted he's guilty of soliciting a fraud,

extortion and mail fraud representing the sun set district. during the year, yu issued an apology saying quote i am truly sorry for the disgrace i have brought myself, my family, the city. i accept full responsibility for my actions. >> he feels really bad for the people of the sunset that he's really let them down and made huge mistakes. >> he clearly put his own interests ahead of those of the public. >> reporter: he tried to shake down the owners of the tapeoka drink store in exchange for $84,000. his attorney says the money was meant to go toward city prompts. >> the way he saw politics operating when he was brought up in the system people got money whether it was red envelopes or cash payments payments then used that money to do things in the community. >> yu resigned from office. yu came to court hoping the sentence would be no more than a year many prison.

but the judge sentenced yu to 68 months behind bars that's more than five year and he has to pay a $10,000 fine. he began serving his sentence july 1st. before and after sentencing yu said he was sorry. >> i just apologize to everybody in the city. to -- to my colleagues on the board of supervisors. to my family and friends. >> reporter: yu admitted that four weeks after taking office he took $8,000 in cash in exchange for helping to steer the business through city bureaucracy. he was maintaining that he wanted to use the money to repair a park and that he was

unclear on politics. about a dozen of yu's friends came to show support. >> i know he should have known better. leland yee said he told authority that is he had heard extortion allegations against ed yu. now that yee himself has been arrested on corruption charges, yee's attorneys called his comments outrageous. he made a statement in a recent interview with amber lee. >> reporter: ed yu's attorney describes the former san francisco supervisor as a property jay -- protegee of yu. yu recently finished serving nearly five years in federal prison. he faces another six months in county jail for perjury.

but his attorney now says that yu is eligible for home detention. attorney stewart hamlin says yu fits the criteria because he committed nonviolent crimes. the judge may order yu to perform community service. yu wants to resume running his family's flower shop in china town. >> you change. time in prison will change any of us. >> reporter: yu has not spoken publicly since his fall. >> probably the biggest political scandal in san francisco. it really hurt it is imagine of all politicians. >> reporter: jim roth has worked on campaigns with newsom and others. the allegations against yu point to improving

transparency. >> reporter: a crime to which he himself would later plead guilty. here at the canton flower shop on waiverly place owner ed yu is busy filling orders, getting ready for the lunar new year. he says he knows full well that the coming holiday brings more than celebration. it also brings extortion. most of the time it starts when someone shows up with a plant like this and asks the store owner for thousands of the dollars. don't pay and you will get hurt. >> they follow them into the house. so that's the thing that perhaps will get to these merchants and these

proprietors. they will say you're coming to my home. i don't want this to happen. please take this and leave me alone. >> reporter: sometimes threats are carried out. merchants will remember what happened to two store owners. at the start of lunar year, two businesses were burned. in the past merchants say they've been afraid to call police to report extortion attempts. but because of community outreach that fear seems to be slowly fading away. and that's it for this week's second look. i'm julie haener. thank you for watching.

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how come we don't have the same number of containers and lids? why would they ever get separated? built-up resentment, money issues, met a younger lid. huh? mm-hmm. mom, where's my science homework? uh, it's over there on the table. so, alex, honey, what's going on? - anything exciting? - no. - any boys? - no. i'm feeling a little bit disconnected from alex right now. last week, i picked up her cellphone thinking it was mine, and i accidentally read a few flirty text messages that were probably from a boy in her class, which is fine. or they're from a drifter. come on, isn't there something you want to share with your mommers? yeah. don't call yourself "mommers." he blew his lid when she tried to contain him. [chuckles]