Gino Lister, who was accused last year of stealing jewelry and technological equipment from Wellesley Middle School while working there as a custodian, recently was charged with armed robbery at a Millis pizza shop, the Norfolk district attorney’s office said. Lister’s arrest in October on theft charges at the middle school sparked fierce debate in town over how the school district conducted criminal background checks on prospective employees. He no longer works at the school. On May 5, according to the district attorney’s office, Lister allegedly robbed Marinho’s Pizza on Main Street in Millis while wearing a mask and carrying a 5-inch knife. Lister was indicted by a Norfolk County grand jury on June 21 on three counts of masked armed robbery, and one count of breaking and entering in the daytime to commit a felony, the Norfolk DA’s office said. He was arraigned July 12 in Norfolk Superior Court in Dedham, where he pleaded not guilty, and was held on $10,000 bail. Lister is due back in court on Aug. 8 for a pretrial conference. That is also the date Lister is due to return to Dedham District Court, where he is facing charges related to the theft of more than $30,000 worth of jewelry and equipment from the Wellesley school, the district attorney’s office said.