Where a defendant seeks to submit expert testimony concerning validity of the single primary source of evidence against him, the trial court is obligated to provide “meaningful inquiry” into the necessity of such testimony; further a failure to do so may result in reversible error. The Illinois Appellate Court, 1st District, 1st Division, reversed and remanded a decision by Cook County Associate Judge Timothy Joseph Joyce. At 11:20 p.m. on May 3, 2008, Jason Gill and Lydia Clark were sitting on Gill …