ARROYO GRANDE, Calif. (AP) — Authorities plan to update the public Friday on a grounds search at a home connected to the man convicted of killing 19-year-old college student Kristin Smart in 1996. Her body was never found. The San Luis Obispo County Sheriff’s Office in California has planned a news conference for 9 a.m. The office served a search warrant Wednesday on the home of Susan Flores, whose son Paul Flores was convicted in 2022 of killing Smart. Authorities have not answered questions about what prompted the search, but scientists specializing in human decomposition and soil took samples from the ground. Tim Nelligan, an expert in soil vapor testing, confirmed by phone Thursday that he was on the premises, gathering samples from the yards of Flores and a neighbor. He said is team has, in general, “come up with a methodology to assess soil vapor” and its relation to “human cadaver decomposition,” but that he could not discuss the current investigation.…