Tucson police determined the deaths of three people found inside a residence Monday was a murder-suicide.

The three are identified as 35-year-old Mario Morales Sr., his wife, 34-year-old Stephanie Morales and their 16-year-old son Dario Morales.

The investigation revealed that Mario Morales Sr. shot and killed his son and wife before turning the gun on himself.

Detectives say the Morales' were married, but were separated and living apart.

Police say a relative of the victims found the bodies late Monday afternoon after making a visit to the home on the city's west side.