Quintero is using the insanity defense. He had previously been deported after a felony conviction for indecency with a child, but returned to Texas.
Accused cop killer's trial set to begin
HOUSTON /*Juan Quintero*/ is charged in the murder of officer Rodney Johnson back in 2006. Quintero was in the back of Johnson's squad car at the time. Prosecutors say he shot Johnson with a gun he was hiding in his pants.