Was promoting Avengers : Age of Channel 4 in interview for Ultron in UK . Hollywood star was furious when questioning suddenly became personal . Stormed off when asked about drugs and his relationship with his father . He spent time in California substance abuse facility and prison . Actor was arrested numerous times between 1996 and 2001 . Downey Jr 's son Indio was arrested for drug possession last June .
Was promoting Avengers : Age of Ultron in interview for Channel 4 in UK . Hollywood star was furious when questioning suddenly became personal . Stormed off when asked about drugs and his relationship with his father . He spent time in California substance abuse facility and prison . Actor was arrested numerous times between 1996 and 2001 . Downey Jr 's son Indio was arrested for drug possession last June .