Jake Randolph in "Tiki Moon" Pt. 241

"I mean," Stan continued, "you're the one that let that Garfield clown stumble on to our little arrangement."

Aha. So, Garfield's hit-and-run wasn't a random incident.

"I tried to pay him off but the bastard wanted more money than I pay you!" Nick said angrily.

"Well, he's dealt with now. And Deborah is out of the way, so it should be smooth sailing from here," Morty said. Stan looked at him with disgust. It was obvious he had little affection for Morty.

"Well," Stan said, "if anything else comes up I'm quite sure Mr. Saint can handle it."