Christmas Day massacre in Grapevine left seven people dead.
Police Monday revealed that the alleged shooter, Aziz Yazdanpanah, was dressed in a Santa Claus outfit and waited until the presents were opened to kill the victims and then himself.
Neighbors confirmed to News 8 the identities of at least four of the victims in the tragedy.
Grapevine police say it was an apparent murder-suicide that took place right after a Christmas celebration, and say the shooter was wearing a Santa suit when he got out of his Toyota 4-Runner.
