SPRING, Texas -

Harris County Sheriff's investigators are looking for the son and brother of a mother and daughter who were found dead in their Spring home this morning.

Deputies say 54-year-old Mark Desper Gideon is a person of interest in the deaths of his 75-year-old mother Margaret Gideon and his sister, 52-year-old Vonda Gideon. 

Their bodies were found in separate bedrooms in the residence on Kirkleigh Lane and Highworth Drive. Deputies found the bodies after neighbors reported not seeing the women for nearly a week.

Detectives say their bodies had signs of trauma, but a coroner will have to determine how they died.

Vonda Gideon's 2012 Honda pickup truck with a wrapped ReMax sign on it is missing. The license plate is BW6 1222. Police have entered the vehicle as stolen.

Deputies say they were recently called out to the house on Oct. 10 and 16 for reported family disturbances.