Secrete in a rural town
There was an older woman who was caring for her invalid husband and her retarded son. She was receiving Medicaid money for the upkeep of her ailing crippled husband and her equally sick and ailing son.
One day she suddenly passed away and when her home was entered it was discovered that her husband had been dead for many years and that the government had been paying her to care for a corpse.
The mans body was kept in a deep freezer and was frozen solid. Her son is retarded and not legally responsible for his mother's theft of services.