A former Texas judge serving time on death row for gunning down a prosecutor in front of a courthouse and also slaying a district attorney and wife months later is seeking a new capital punishment trial. Nearly a decade after the one-time Kaufman County justice of the peace Eric Williams was convicted of going on a killing spree that killed Kaufman County District Attorney Mike McLelland, his wife Cynthia, and Assistant District Attorney Mark Hasse — he wants another crack in the court, according to WFAA. In his 169-page filing, Williams claims his defense was hastily prepared for the state’s …