08/10/2012 05:59 pm ET

Patrick Mikes Jr., Former Notre Dame Student, Charged With Killing His Father After 'Violent' Struggle

Former Notre Dame student Patrick Mikes Jr. was arrested on Wednesday night and charged with killing his father after a "violent encounter" in the basement of the family's home in Troy, Michigan, say police.

The 21-year-old senior psychology and pre-med double major, who has not been a student at the school since August 2, was arrested at a restaurant after DNA blood analysis evidence from the home showed that his blood was found with his father's, "indicating a struggle between the two men," reports WSBT-TV.

Mikes Jr. has initially told investigators that his father had never returned from a bike ride on July 27. But the elder Mikes's riding shoes and helmet - as well as the blood evidence - were found in the family home, casting doubt on the son's story.

After a lengthy search by dozens of investigators and 12 police dogs, the police found Mikes Sr.'s body and his bicycle in a cornfield on Friday, just 30 feet from where the previous day's search had been halted, reports the Detroit Free Press. The cornfield is about 62 miles from the family's home.

Mikes Jr. was also seen on surveillance video buying a large quantity of cleaning supplies on July 27, police told Clawson Patch.

“We are confident that Mr. Mikes Sr. was killed by his son,” Capt. Bob Redmond told the Oakland Press.

Mikes Jr. is being held without bond in the Oakland County Jail. His attorney entered a plea of not guilty on Wednesday.

"There are no psychological problems, no past criminal behavior," said his attorney, Christopher Andreoff, reports the Detroit News. "He has led a very wonderful life."