Michigan police are now calling the case of a missing Notre Dame alum a homicide.
They say it's unlikely Patrick Mikes, Sr. survived what they call a "violent encounter" in the basement.
He hasn't been seen since last Thursday.
The 1979 Notre Dame grad lived in Troy, Michigan with his 16-year old son and his 21-year-old son, Patrick Mikes, Jr.
Patrick, Jr. faces charges of illegally using his 16-year-old brother's credit cards.
He is a senior psychology and pre-med double major at Notre Dame.
Police have said Patrick, Jr. is a person of interest in the case, but at this point he doesn't face charges in his father's disappearance.
But police say it's unlikely Patrick Sr. survived because of the blood in the basement.
They also say police have video of Patrick, Jr. buying cleaning supplies at a store, and he told police his father went for a bike ride.
Police say that is a lie. All of his riding gear was found in the home.
Patrick, Jr. is still being held in the jail on unrelated charges.