According to the Lincoln Journal Star, Dennard pushed the officer and then punched him on the left side of the face. Dennard had a brief struggle as four other Lincoln police officers took the outgoing senior into custody.
Thought to be a second-to-third round selection in next week's NFL Draft, Dennard is rated by Scout.com as the No. 5 corner in this year's crop.
The incident occurred between 2 and 3 a.m. Dennard will remain at the Lancaster county jail and is likely to not get out until Monday morning at the earliest.
The reigning Big Ten Tatum-Woodson Defensive Back of the Year, Dennard will likely go down as one of the greatest corners in Nebraska football history, but his college career ended with controversy.
"That's not the type of person I am. So I'm very sorry for that," said Dennard, a native of Rochelle, GA., after the game, when explaining the actions that resulted in his ejection.
"I hit him out of bounds, he pushed me, and I hit him back," Dennard stated. "Once I realized I got a flag, it kind of hurt me."
"Once I get my hands on a receiver, they are done," said Dennard at the NFL Combine in February. "That's what I was taught at Nebraska. You get in the receiver's face all day long.
"Height doesn't matter, size doesn't matter. You have to have that dog to play cornerback and have that mentality you can stop anyone on the field."
Dennard's career at Nebraska was sometimes overshadowed by Prince Amukamara, who is now with the New York Giants. It wasn't until Dennard's senior year he was thought to be a leader in the Nebraska secondary.
He entered 2011 as a Preseason All-American after being named Second-Team All-Big 12 his junior season. Nebraska ranked fifth nationally in pass defense efficiency and yards allowed during his junior year.
The University of Nebraska along with head coach Bo Pelini had no comment on the incident.