John Gavaghan faces up to five years in prison and a $10,000 fine at Friday's sentencing.
Gavaghan's co-defendant, Bridget Wismer, was sentenced Thursday to a mental health treatment program after pleading guilty but mentally ill to a charge of falsifying a birth certificate.
A Wilmington judge sentenced Wismer to five years in prison but suspended that sentence for 18 months of intensive mental health probation.