The Fourth Department explained the law concerning when a municipality may be liable for an assault by one inmate (in county jail) upon another. The court also noted that, absent a local law to the contrary, the county may not be held vicariously liable for the actions of the county sheriff or sheriff’s deputies:
We agree with plaintiff … that the court erred in granting defendant’s motion and dismissing the complaint in its entirety on the ground that it owed no duty of care to plaintiff, who was being held in jail on a pending criminal charge at the time of the assaults. It is well settled that “[a] municipality owes a duty to inmates in correctional facilities to safeguard them from foreseeable assaults [by] other inmates” … . “[T]his duty does not render the municipality an insurer of inmate safety, and negligence cannot be established by the mere occurrence of an inmate assault . . . Rather, the scope of the [municipality’s] duty to protect inmates is limited to risks of harm that are reasonably foreseeable’ ” … . We therefore modify the order… by … reinstating that part of the first cause of action alleging that defendant breached the duty it owed to plaintiff to protect him from foreseeable assaults committed by other inmates. Villar v County of Erie, 2015 NY Slip Op 02229, 4th Dept 3-20-15