CONCORD, N.H.—The wife of a man whose daughter went missing in 2019 has been charged with welfare fraud for collecting food stamps in her name, the New Hampshire attorney general’s office said Thursday. Kayla Montgomery, 31, of Manchester, has been charged one with one count of welfare fraud for obtaining $1,500 in food stamps from December 2019 to June 2021 for Harmony Montgomery even though the girl was not living with Kayla and her husband Adam Montgomery. Kayla Montgomery, who is not the biological mother of Harmony Montgomery, will be arraigned at 11 a.m. in the Hillsborough County Superior Court. It was unclear if she had a lawyer and a phone listing for her could not be found. Adam Montgomery was charged Wednesday with several counts, including failing to have her in his custody. The 31-year-old had not guilty pleas entered on his behalf by his lawyer. He has been …