Agrus Kos, Spirit of Justice

If a suspected creature loses all abilities, it will lose menace and "This creature can't block", but it won't stop being suspected.

There's no limit to the number of creatures that can be suspected simultaneously. Suspecting a new creature doesn't cause other creatures to stop being suspected.

Being suspected isn't a copiable value. If a permanent becomes a copy of a suspected creature, it won't be suspected.