A former Boston police officer will plead guilty in connection with an ongoing investigation of overtime fraud at the department’s evidence warehouse, according to the U.S. Attorney’s Office. Thomas Nee, 64, of Quincy, agreed to plead guilty to one count of conspiracy to commit theft concerning programs receiving federal funds and one count of embezzlement from an agency receiving federal funds, investigators said. Nee is the former president of the Boston Police Patrolmen's Association, the city's largest police union.From at least January 2015 through February 2019, Nee submitted false and fraudulent overtime slips for “purge” and “kiosk” overtime hours that he did not work at the evidence warehouse, investigators said. Purge overtime is a 4-8 p.m. weekday shift intended to dispose of old, unneeded evidence. Kiosk overtime involves driving to each police district in Boston one Saturday a month to collect old prescription drugs to be burned. For the purge shifts, Nee claimed to have worked from 4-8 p.m., but he and other members of the unit routinely left at 6 p.m. or earlier, investigators said. For the kiosk shift, Nee submitted overtime slips claiming to have worked 8.5 hours, when he and other members of the unit only worked 3-4 hours of those shifts, investigators said. As a result of the fraudulent overtime submittals between January 2015 and August 2017, Nee personally collected approximately $16,642 for overtime hours he did not work, investigators said. Nee is the 15th Boston police officer to have been charged in connection with committing overtime fraud at the department’s evidence warehouse. Nine of the charged officers have pleaded guilty.If convicted, Nee faces up to 10 years in prison on the embezzlement charge.