Quote Originally Posted by Assertn
Lafitte wasn't in the flashbacks. Blackbeard already stated his motivations: He had no intention of killing a division commander, and if he never found the darkness fruit, he would've remained in the crew.
Look at page 12, at the top, 3rd panel from the right. Lafitte is the guy with the moustache.

Also, I think here significance in the fact that blackbeard turned down the oppurtunity to become 2nd division captain when asked by Ace.