What? He genuinely got off scot-free and sabotaged it for literally no reason? Alarm bells should be going off in his head, her grandparent is well connected, I'm assuming he knows grandpa's only child is On Jurim which should be common knowledge especially for a Hunter which means Gru is his kid. Gru is also a 4 year old throwing around 20k unsupervised which should also be a blaring alarm.