MANKATO, Minn. -- A male sought in connection with an altercation involving former Rutgers quarterback Philip Nelson that left a 24-year-old man in critical condition has been arrested, Mankato Department of Public Safety announced on Tuesday.

Trevor Stenner Shelley, 21, of St. Peter, Minn., was taken into custody Monday evening, according to a statement. Police are seeking the same counts that Nelson faces: felony first- and third-degree assault charges.

Shelley is expected to be arraigned Wednesday morning. He attended attended West High in Mankato with Nelson, but police would not say whether the two knew each other.

Police had sought the public's help in apprehending the person seen on video sucker punching Isasac Kolstad, who crumpled to the ground unconscious outside a Mankato bar. Nelson then allegedly delivering one kick to Kolstad's head.

Police said they are still seeking additional witnesses.

"Prior to this information being released, the assault victim's family was notified about the arrest and status of the investigation," the statement read. "Mankato Department of Public Safety officials appreciate the help and involvement of citizens who came forward with information."