Martin Family via AP Photo
A 28-year-old who took it on himself to keep an eye on crime in his gated Florida community has come under scrutiny after he shot an unarmed black teenager, Travyon Martin, whom he thought looked suspicious. George Zimmerman was a regular 911-dialer, placing 46 calls to the police since Jan. 1, 2011, and patrolling the neighborhood in his car. The criminal-justice student called the police again on Feb. 26, the night Martin was killed, to say that he saw “a real suspicious guy” in the community who looked “like he’s up to no good,” according to emergency-dispatch recordings released Friday. Residents of the Retreat of Twin Lakes community say Zimmerman, who was licensed to carry a firearm, would sometimes go door to door, asking that they be on the lookout of suspicious characters, and young black men in particular.