New court documents are shedding light on how Ruben Flores allegedly assisted his son, Paul, in the murder of Kristin Smart. 

According to a county probation report seen by The San Luis Obispo Tribune, investigators believe Smart's body, who disappeared from a California university in 1996, was initially buried in the backyard of Ruben's Arroyo Grande home. The documents state that investigators "are in possession of biological evidence that makes them believe the victim was buried underneath (Ruben Flores') deck at one time."