Proposition 9 allows the governor to grant a pardon to a person who successfully completes a term of deferred adjudication community supervision.  This does not allow for pardons of violent criminals.

You can find more information here: http://www.lrl.state.tx.us/legis/billsearch/text.cfm?legSession=82-0&billtypeDetail=SJR&billNumberDetail=9&billSuffix=&startRow=1&IDlist=&unClicklist=&number=100