An arrestee may not maintain excessive-force claims against four police officers despite what he says is a “blue wall of silence“ concealing which specific member of the group assaulted him, the U.S. Court of Appeals for the Third Circuit ruled Wednesday.

The appeals court affirmed a summary judgment dismissal of claims against two New Jersey state troopers and two officers from the Riverdale police department based on plaintiff Emil Jutrowski’s failure to claim a personal involvement by each officer in the assault on the plaintiff.