City: Chicago
When: 5/15/2012

Score one for the bad guys, unfortunately. In May, a group of vigilantes trying to apprehend a mugger on the L platform in Chicago lost out to a knife-wielding assailant after attempting to recover an iPhone stolen from another passenger. The four men, members of the prestigious Guardian Angels, had been trying to subdue the mugger when an accomplice with a folding knife attacked all of them on a busy subway platform, leaving them all with non-fatal stab wounds for their efforts. One member required 17 stitches to close a laceration on his right arm.