The Providence Journal WARWICK — In a secure area of the Cranston Police Department, Officer Andrew Leonard noticed something about a prisoner: The young man's nostrils were flaring. The man, Gian Mattiello, had quickly turned toward Leonard as another officer tried to remove a tie from Mattiello's long hair. Then, Mattiello had moved his forearm in a way that broke Leonard's grip on his right arm. This was the testimony that Leonard gave Wednesday in District Court, where he is on trial, accused of assaulting Mattiello in an excessive use of force in March of 2020. Leonard took the stand after prosecutors rested their case. His appearance followed testimony from Mattiello, who accused the officer of ambushing him. And it trailed testimony from a Cranston police captain who said he was troubled by surveillance video of what had transpired in the booking area — where Leonard's presence wasn't even necessary in the first place.