NEW : Daly did n't immediately know whether the officer 's service weapon was used in the shooting . Dead are Denise Stirkens , 53 , and son , Christopher Stirkens , 25 , police say . NEW : James Stirkens , 58 , a patrol sergeant , is put on routine administrative leave . An off-duty police officer shot and killed his son in the family home . New York City Police Department Chief of Detectives Robert Boyce says he will not be charged with any crime for shooting at an unarmed suspect who was trying to kill him during a confrontation last month.
NEW : Dead are Denise Stirkens , 53 , and son , Christopher Stirkens , 25 , police say . NEW : James Stirkens , 58 , a patrol sergeant , is put on routine administrative leave . An off-duty police officer shot and killed his son in the family home . New York City Police Department Chief of Detectives Robert Boyce says he will not be charged with any crime for shooting at an unarmed suspect who was trying to kill him during a confrontation last month.