December 24 -- December 25 -- Bruce Pardo , while wearing a Santa suit , kills 9 people during a Christmas Eve party .
December 24 -- December 25 -- Bruce Pardo , while wearing a Santa suit , burns down the house during the Covina , California massacre .
December 24 -- December 25 -- Bruce Pardo , while wearing a Santa suit , kills 9 people during a Christmas Eve party and burns down the house during the Covina , California massacre .