In 2016, the teen’s car was abandoned on I-5 near Tumwater with his wallet, cash, and cell phone inside. He hasn’t been seen since. THURSTON COUNTY, Wash. — A vigil held this month marked a decade since 19-year-old Logan Schiendelman vanished from Thurston County, with his family still desperate for answers and law enforcement renewing efforts to solve the case. Logan Schiendelman disappeared on May 20, 2016. The day before, his grandmother — the last family member to see him — said he seemed unsettled. “He was acting a little nervous and he said he had an epiphany of who…