I didn't find that quote exactly, but what I found in several stories was close:
While campaigning in Louisiana, Gingrich described Zimmerman as "a guy who found a hobby that is very dangerous" and said he "was clearly overreaching" his watch responsibilities.
"I suspect that justice will be done and I think it is a tragedy. In that sense you have to understand how much of a tragedy it is for the family and for the young man involved," Gingrich said.
“....you have to understand how much of a tragedy it is for the family and for the young man involved,” Gingrich said.”
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And what about Zimmerman? Noone knows if he enjoyed pulling that trigger? He might be in a state of depression.