NEW : Dead are Christopher Stirkens , 58 , and son , James Stirkens , 53 , police say . Police identified the deceased as Denise Stirkens , 53 , and her son , Christopher Stirkens , 25 . NEW : Denise 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 . The son was allegedly stabbing his mother , who later died in the hospital .
NEW : Dead are Christopher Stirkens , 58 , and son , James Stirkens , 53 , police say . NEW : Denise 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 . The son was allegedly stabbing his mother , who later died in the hospital .