Reasonable Doubt
Instant
Counter target spell unless its controller pays 
.
Suspect up to one target creature. (A suspected creature has menace and can't block.)
"Merle had the motive, but Blovinac was the one caught with the murder weapon. And who was the seven-foot-tall hooded figure? This case is a mess!"
Illustrated by
Murders at Karlov Manor#69CommonEnglish