Where the defendant seeks to file a successive post-conviction petition after a procedural default, he must establish both prejudice if he is denied and a valid cause to excuse his procedural default.The 1st District Appellate Court affirmed the decision of Cook County Associate Judge Stanley Sacks.On Dec. 13, 2008, Jose Rodriguez left the El Plan bar to give a friend a ride and returned shortly afterward. When he returned, a red van pulled up and two men got out. One was Lazaro Perez, and one was Jose Valdovinos …