chaudhry zulfikar died shortly after. the attackers got away, and authorities in pakistan are not speculating on the motive. >> he was driving to court when gunmen pulled up to his car and fired from at least two directions. more than a dozen bullets struck his body. there were other victims. >> his bodyguard showed great valor. he was injured. and he was prosecuting several high-profile cases in pakistan, including the 2008 terrorist attack on the indian city of mumbai and the 2007 killing of former prime minister benazir bhutto. he said there was evidence of former prime minister pervez musharraf's involvement in the case. on friday, he was heading to the anti-terrorism court for a hearing on the case. >> this is a very tragic incident because a trial is going on and an effort has been made to stop it. all i can say is that this is very tragic. >> the killing of benazir bhutto unleashed a wave of protests across pakistan. no one has ever been convicted of her murder. zulfikar was trying to change that. >> i am on the li

chaudhry zulfikar ali was shot at least 13 times in islamabad as he was driving to court. car was riddled with bullets. the gunmen fled in a taxi and on motorcycle. ali was prosecuting militants jailed in connection with benazir bhutto's 2007 death in a gun attack and suicide bombing. president obama made an urgent appeal for immigration reform during a visit to mexico city today. at least six million mexicans are believed to be living in the u.s. illegally. today, the president told a crowd of college students he's convinced that, working with congress, they can overhaul the u.s. immigration system this year. >> the immigration system we have in the united states right now doesn't reflect our values. it separates families when we should be reuniting them. it's let millions of people to live in the shadows. it deprives us of the talents of so many young people even though we know immigrants have always been the engine of our economy, starting some of our greatest companies and pioneering new industries. >> reporter: president obama also conceded the root of much of mexico'