Stewart was interviewed after the incident , authorities have said . Investigators are looking at a second video recorded Saturday night , sheriff says . Medical examiner releases only cause of death , no further details . Comment: Kevin Ward Jr. died from injuries after Stewart hit him during a caution lap .
Investigators are looking at a second video recorded Saturday night , sheriff says . Medical examiner releases only cause of death , no further details . Comment: Kevin Ward Jr. died from injuries after Stewart hit him during a caution lap .