Police questioned the son of an elderly woman who was found dead in Gravesend.

Police say Petrina Masotto, 91, was found unresponsive at 8699 26th Ave. around 1 p.m. Wednesday.

The 55-year-old man in question lived with the deceased woman. Sources say the man is also undergoing a mental health evaluation.

The medical examiner is working to determine how she died. 

A neighbor says another son of the victim lived downstairs and was often concerned about his mom's well-being.