Forensic Researcher is a uncommon Creature — Merfolk Detective card from Murders at Karlov Manor (MKM), collector number 58. Current market price: $0.29 (foil $0.31), TCGplayer market prices via Scryfall.
{T}: Untap another target permanent you control. {T}, Collect evidence 3: Tap target creature you don't control. (To collect evidence 3, exile cards with total mana value 3 or greater from your graveyard.)