The number of justifiable homicides in Memphis jumped from 11 in 2006 to 32 in 2007. No one is sure why, but one man has a theory. "The thugs have started running into people who can protect themselves," said Tom Givens, owner and instructor at the firearms training school RangeMaster, 2611 S. Mendenhall in Memphis. Police detectives and prosecutors don't think it's that simple, and they acknowledge the spike could be a one-time occurrence. "It's hard to put your finger on it," said police Lt. Joseph Scott. "There are more handgun carry permits, there is more education, but you can't...
