american student imprison north korea 17 months die lack oxygen blood brain ohio coroner say wednesday otto warmbier death june 19 due unknown injury occur year death hamilton county coroner dr. lakshmi sammarco say news conference know happen bottom line sammarco say warmbier parent could reach comment coroner report university virginia student hold north korea january 2016 release june 15. warmbier 22 return unite state coma coroner sept. 11 report office cite complications chronic deficiency oxygen blood supply brain warmbier death external examination body rather full autopsy conduct request warmbier family north korea blame botulism ingestion sleep pill otto warmbier problems dismiss torture claim warmbier die days arrive back unite state native wyoming ohio arrest airport pyongyang prepare leave reclusive communist country travel tour group warmbier sentence 15 years hard labor try take hotel item bear propaganda slogan north korea state media report say son torture fred warmbier tell fox news interview tuesday look try comfort look like someone take pair pliers rearrange bottom teeth great interview foxandfriends parent otto warmbier 1994 2017. otto torture beyond belief north korea president donald trump say twitter follow interview broadcast response question news conference coroner say evidence trauma warmbier teeth evidence break bone coroner report say warmbier body multiple scar vary size include large irregular one measure 4.3 1.6 inch right foot u.s. student hold north korea die oxygen starve brain coroner