Conversation so far:
Did Chris have children?
In 2001 Chris married Villanueva and they had two children, a boy and a girl.
what happened in 1998?
John Garza introduced him to Venessa Villanueva, and after getting to know each other they became a couple in 1998.
Who is John Garza?
CANNOTANSWER.
why was 1995 important?
She was pronounced dead within the hour.
Who was found dead in 1995?
Selena.
How did Selena die?
Saldivar reached into her handbag, pulled out a Taurus Model 85 .38 caliber revolver, pointed it at Selena and pulled the trigger.

Question: Who is Saldivar?
Self-contained rewrite: Who is Saldivar, that killed Selena?