Is Reasonable Doubt legal in Standard, Modern, and Commander?

Reasonable Doubt is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Reasonable Doubt

Q: What type of card is Reasonable Doubt?

Reasonable Doubt is an Instant. Its oracle text reads: "Counter target spell unless its controller pays {2}. 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!"*"