Hamish, Master investigator

Whenever an opponent commits a crime, investigate. This ability triggers only once each turn.

Whenever you sacrifice a clue, until end of turn target investigator gains skulk and has "Whenever this creature deals combat damage to an opponent, surveil 1"

Whenever a Case enters the battlefield under your control, suspect target creature and detain it. When you solve that case, put that creature on the bottom of its owners library and you draw 3 cards.