The search for a missing Notre Dame graduate, who police suspect was murdered by his son, has expanded.
55-year-old Patrick Mikes Sr., of Troy, Michigan has been missing since last Friday.
His son, Patrick Mikes, Jr., a senior pre-med student at Notre Dame is being called a person of interest in the case.
But, so far, he has only been charged with credit card fraud.
Police believe the older Mikes was murdered in the family's basement outside Detroit.
Police sources tell our sister station in Detroit that they believe Patrick Mikes Sr. was murdered because he may have threatened to cut off his son financially.
On Friday, their search took them about 50 miles northwest of Troy, to the Flint area.
They searched the Flint River by boat and used cadaver dogs to scour a nature area as well as a nearby landfill.
Police are also handing out flyers asking residents there whether they've seen a charcoal colored infinity in the area over the past couple of days.
Investigators are also going door to door looking for leads.
Patrick Mikes Jr. remains free on $50,000 bond in connection with the unauthorized use of his younger brother's credit cards.