Alastor & Leo
Besides, Alastor had a memory for offenders, and Leo Samander was on his private To Watch Out For List. The idiot tried to smuggle highly dangerous, restricted items, all for some bleeding heart excuse - who was to say that he wouldn't do it again? Alastor didn't trust Leo, but then again, Alastor didn't trust most people.
The way Leo reacted was exactly the thing that Alastor thrived upon - he loved pushing people's buttons to see how they'd behave, and if he could intimidate somebody, all the better.
"You sure you ain't getting all sweet on me?" he asked, with a threatening hint to his voice. "You look nervous. You trying to hide something? Been doing some more smuggling?"