The police said he had been identified by robbery victims from a bank camera photograph.
The officers said they were unable to find the robbery victim.
Both the robbery victim and his six attackers are black.
Indeed, there were several instances in which robbery victims went to community centers for help rather than risk calling the police.
The other robbery victims ranged in age from 60 to 95, the police said.
She appeared to have been a robbery victim, the police said.
One in 12 robbery victims has a major mental health problem, he said.
The police did not release the identities of the robbery victims.
One of the robbery victims was shot in the leg.
The robbery victim reported that her attacker, whose face she did not see, was a black man.