A Minnesota father is now behind bars in connection with his son's death and one family member says they had suspicions about him all along.

According to the criminal complaint filed on Wednesday, preliminary autopsy findings showed there was "evidence of decapitation by knife" and classified his death as a homicide.

Jordan Dupree Collins Sr., 38, is charged with one count of second-degree murder, according to court documents filed Wednesday in Anoka County. According to the complaint, an autopsy of Collins Jr. found "evidence of decapitation by knife.