Is this real estate transaction legal or fraud?

My sister's husband may be disposing of assets and hiding money while they divorce. He owned a home in his name. The Court authorized its sale it to a couple for $116k in 11/18, the money to be put in his attorney's trust acct. She just found he executed a warranty with them for $1 on 1/4. Then the couple executed a Trust Deed to each other for $1 the same day. The couple had executed a Warranty Deed for a property they owned for $1 to a second couple on 12/31. There is no evidence of the $116k having been paid for the house, nor where that money is! This couple has a decent history of court litigation, from a long string of 22traffic tickets, 2 personal debt collection judgments, a nonscheduled traffic violation with suspended license for 3 yrs, 2 paternity suits, she was somehow involved with a sex offender who was sent back to prison, she filed domestic abuse assault charges and had a guy arrested, got a restraining order then had it dismissed, he has a misdemeanor criminal conviction, was sued for business debts and wage garnishment when he didn't pay up as ordered. She's unsure if this is fraud and reason to file for Contempt - this isn't what the Court authorized!