SAN LUIS OBISPO (KPIX) – There has been a major development in the disappearance of Kristin Smart, a Stockton teenager who disappeared in 1996.

Authorities are now searching the former home of the man who’s now been named the prime suspect in the case.

READ MORE: UPDATE: Investigation Finds San Leandro Officers Didn't Follow Use of Force, Taser Policies in Fatal Walmart Shooting

(San Luis Obispo County Sheriff’s Office)

Smart was last seen at a part at Cal Poly. The San Luis Obispo County Sheriff’s Office started searching a former home of Paul Flores, who was the last person to see Smart alive.

READ MORE: Bouncing Back? New Unemployment Claims In California Down Drastically

Detectives were using cadaver dogs as part of the search which could take two days to complete.

MORE NEWS: San Jose Launches 'SJ Aspires' College Tuition Assistance Program For 700 Students

Smart was 19-years-old when she disappeared. Her remains have never been found, but she was legally declared dead in 2002.