In this Sept. 20, 2011 photo, Pakistan's senior police investigator Chaudary Aslam stands with his colleagues in Karachi's troubled area of Lyari in Pakistan. Aslam, a senior police investigator known for arresting dozens of Pakistani Taliban, was killed Thursday, Jan. 9, 2014 in a car bombing, a sharp blow to efforts to crack down on militant groups seeking to gain a foothold in the sprawling southern city of Karachi that’s vital to the country’s economy. (AP Photo/Shakil Adil)