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.

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(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.

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

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