Conversation so far:
What happened with Chris Pérez in 1989?
Quintanilla invited Chris Pérez to one of Selena's performances, and asked if he was interested in playing with Selena y Los Dinos. Chris accepted.
What legal problems did Chris Pérez have?
In 1991, Chris  Pérez was arrested for driving under the influence and speeding in San Antonio, Texas.

Question: Was he convicted for the offense?
Self-contained rewrite: Was Chris Pérez convicted for the 1991 offense?