screwing a dna test

so this guy i dated switched his dna samples to avoid paying child support when the lady wasnt looking... thats what he told me he didnt want this child ... courts told me to find her bio dad...when we left court he said see told you id get my way...hes scum... now that im married he says hes sorry hes willing to retake dna to prove hes her dad and wants to be with me ... im like u can test but ull probably go to jail for messing with shit