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EXCELSIOR SPRINGS, Mo. -- A school resource officer from Clay County received a surprise on Wednesday morning.

He'd assisted in an important arrest earlier this week, and his friends decorated his office to congratulate him.

When Excelsior Springs Police Ofc. Jeremiah Renne arrived at Lewis Elementary School on Wednesday morning, he had no idea the funny fortune that awaited him. His office was all decked out in fake $100 bills, all of which featured his likeness. Not Ben Franklin's.

Ofc. Renne's cell phone was recording, as he inspected a room filled with photocopied money. His video shows his entire office covered with nearly 100 pantomime C-notes.

“She had them taped to the walls. Taped up here,” Ofc. Renne laughed, as he whirled around his office at the school.

The prank was a friend's way of congratulating him on a job well done.

Ofc. Renne was on his way home from work on Monday afternoon, when a robbery took place at the National Bank of Kansas City branch near U.S. 69 South.

“I realized I was fairly close to the situation. I went as quickly as I could running code. It took awhile,” Ofc. Renne told FOX 4 News.

Ofc. Renne spotted a car that police were looking for. When he called for backup, officers from the Pleasant Valley Police Department arrested a robbery suspect.

Angela Bright, Lewis Elementary School Assistant Principal, is the culprit behind the phoney cash in the school resource officer's office.

“He's a great resource officer. We've enjoyed working with him and getting to know him. I think he's a great addition to our staff,” Bright said.

“All these kids ask me every day, 'Are you a real cop?'” Ofc. Renne said. “Now, I have enough street cred in the hallways to say, 'Yes, I'm a real cop.' They believe me now.”

Ofc. Renne says he's been handing out the photocopied cash to kids at school as souvenirs of the occasion. He says he's keeping just one for himself to remind him of how much he loved this day at school.

An FBI spokesperson says Kansas City resident Kishahn Lewis, 20, is the man Ofc. Renne helped arrest. He's been charged with the robbery, and he faces up to 20 years in prison.