jahar tamerlan tsarnaev is charged with attempting to use a weapon of mass destruction.uld face the death penalty. we are also learning more about what happened to the m.i.t. police officer who was killed. a source close to the investigation says that he was shot four to five times as he sat in his patrol car and was unable to radio in for help. a memorial service will be held for him tomorrow. we're told that vice president joe biden will be attending that. >> all right. thank you, tori. >>> back here at home, san francisco police remain on high alert following the boston marathon bombings. the police department increased patrols and transit centers, sports events and other possible targets. and there soon could be more security cameras on market street. police are saying one of the best tools they have are our eyes and ears, the public. officers are telling everybody, watch out for anything unusual and immediately report any suspicious activity. >>> 7:32. even though crime has increased in san jose, public complaints about the public police have decreased. janine de la

authorities say the two suspects jahar and tamerlan tsarnaev are brothers of chechen ethnicity. the older brother has been shot and killed but the younger brother, jahar is on the run from police. police say the 19-year-old is armed with explosives. watertown massachusetts and other surrounding areas in boston are on lock down. s.w.a.t. teams and police going door to door looking for remaining suspect. >> we have several other new leads just developing and we're working on that. >> the fbi leased more pictures of the alleged trift along with a new wanted poster. >> they can wait him out in a way. he's going show himself at some point. they'll see him if he tries to move. i think that is the hope. >> thursday night a surveillance camera captures this image matching the man identified just hours before as suspect two. later police say the brothers ambushed a campus police officer and m.ti, killing and after car jacking a mercedes suv. the uncle says he hasn't been in touch with nephews for years but urged his sur are vifing nephew to surrender. >> jahar if you're alive turn yoursel

and wounded in the gunfight, but police did shoot one man, 26-year-old tamerlan tsarnaev, identified as suspect number one and jahararnaev's older brother. he later dies at a hospital, strapped to his body, bombs. jaha tsarnaev is still on the run, and an american city is put on lockdown. >> there is a massive manhunt under way. >> full neighborhoods are evacuated and watertown looks like a ghost town while a massive manhunt begins for the second brother, the nation begins to learn just who these men are. the older brother who was married and had a young daughter studied engineering at bunker hill community college. he took the year off to train as a boxer. the younger brother is a student at the university of massachusetts, dartmouth. friends say he was a wrestler and a lifeguard. it turns out the family comes from chechnya, the breakaway soviet republic which has for decades been racked by violence from extremists who have fought against russian control. the family came to the united states more than a decade ago. essarn yahya is the mother of the two suspects. >> he never told me that he would be like on the sid

jahar tsarnaev. he remains hospitalized including a gunshot to the neck. his older brother, tamerlanlso wanted by the fbi in connection to the bombings died friday morning after a shootout with police. authorities say the brothers may have been planning another attack. >> the two suspects were armed with handguns at the scene of the shootout. and there were multiple explosive devices, including a large one that was similar to the pressure cooker device found on boylston street. >> reporter: the threat may be over but the grieving and healing have only just begun. and back to the investigation, we're learning a little bit more about what's happening inside this boston. a source close to the investigation is saying that every several hours, an interview team is going in and asking the suspect very, basic focused questions, things like that a a there any more bombs and weapons and were you acing alone. that -- were you acting alone. that same source told us that suspect is responding by nodding. back to you. >> thank you. >>> san francisco's police chief is considering a nagor new secur

tamerlan tsarnaev. >> in the fbi video, he's suspect number one in the black cap. 26-year-old tamerlan sawyer nauf, walking ahead of his 19-year-old brother jaharce shootout, leaving behind dreams of becoming a world class boxer. in a youtube page in his name with links to his islamic websites, videos from a radical australian preacher, and rap music. in a photo essay shot by a boston university student, tamerlan tsarnaev said, i don't have a single american friend. i don't understand them. he and his brother are from the russian caucuses, an area that includes the war-torn remember republic of chechnya. the family arrived as refugees in 2001 from neighboring kyrgyzstan. then they moved to the u.s. the family claimed asylum. his younger brother came first, authorities say, and became a citizen. tamerlan followed, and got a green card. his aunt, who lives in canada, said friday -- >> he had a daughter and he was very happy about his daughter. >> reporter: but police records show he was arrested for assaulting his girlfriend. his father said tamerlan quit school early to get married. according to a u.s. official, travel records show tamerlan flew