The Illinois Department of Public Health made a mistake when it said Wednesday that an Oak Park nursing home failed to notify the state about an altercation between two residents that left an Alzheimer’s patient dead, an official said today.

Anibal Calderon, 80, died Tuesday of head injuries after an altercation with another resident on Sunday at Oak Park Healthcare Center, authorities said.

An official with the health department, which oversees nursing home facilities in Illinois, said Wednesday that Oak Park Healthcare hadn’t reported the incident, in apparent violation of state law.

But a spokesman said today the department was in error and that the nursing home did notify it about the incident.

Read more at the Chicago Tribune.