California police chief pens open letter saying he is ‘disgusted’ son was involved in attack on elderly Sikh manA California police chief has penned an open letter saying he was “disgusted” to learn his estranged son was allegedly involved in an attack on an elderly Sikh man. Sahbit Singh Natt, 71, can be seen on security camera footage being beaten by two suspects while on his morning walk in Manteca, California. One of the suspects has been identified as Union City Police Chief Darryl McAllister’s son, Tyrone.