Prosecutors say 27-year-old Timothy Jones knew Erin Justice murdered his wife and "aided and assisted Justice after the crime."
On Friday, Jones was arraigned via video on a single count of Accessory After the Fact, a felony that carries a penalty of up to 5 years in prison.
Jones' parents have said they are getting death threats.
Action News has learned that Jones is claiming that when he was helping Justice at the scene of Alicia's murder, the family's house on Ardmore Street, the children were alive.
Jones and Justice are also more than friends. Jones is the uncle to three of Justice's children. Relatives say Alicia Fox was once friends with the mother of Justice's other children, until the two women found out about each other.
Justice allegedly shot and killed Alicia last month, sometime between May 25 and May 27. That's also the same time Fox's children, 6-year-old Kaylah Hunter and eight-month-old Kristian Justice, were last seen.
A tip to Fox's relatives led family members to finding her body Monday night in the basement of a house on the 6800 block of Penrod.
There was no sign of the missing children in the old vacant house.
On Thursday, some of Fox's belongings were found in a dumpster in Dearborn.
Jones is being held on a $50,000 bond, but he can be released after just 10% of that amount is posted.
Investigators say Justice took a plane to Georgia after murdering his wife. He is currently under arrest in Georgia where Detroit Police are going through the process of extraditing him back to Michigan.
Anyone with any information on the missing children is urged to contact Detroit Police or your nearest law enforcement agency.