Police : Dunn ` ` did n't appear to be intoxicated , ' # ##man says . ` ` Speed may have been a contributing factor , '' police say . Dunn 's car was ` ` fully engulfed in flames , '' police say . Ryan Dunn , one of the stars of MTV 's `` Jackass '' films and TV series , was killed in a fiery car crash on a Pennsylvania highway early Monday , police said . A passenger who was killed has not been identified .
Police : Dunn ` ` did n't appear to be intoxicated , ' # ##man says . ` ` Speed may have been a contributing factor , '' police say . Dunn 's car was ` ` fully engulfed in flames , '' police say . A passenger who was killed has not been identified .