Lund was supervising an inmate in the hospital on the morning of May 16 when Jason Burr, 34, entered the hospital wielding two handguns. He demanded prescription pain medications, according to court documents.
Lund fired four shots, striking Burr three times. Burr was taken to an Ogden hospital in critical condition and arrested when he was released from the hospital on June 6.
Lund has been on administrative leave since he shot Burr while the Cache County Attorney's Office conducted an investigation.
"We wanted to make sure we got all of the information," Baird said in an interview Wednesday. "It just takes time on a serious case like this."
Baird plans to file a final report next week, but the letter allows Lund to return to duty.
"Lund wanted to get back to work, and obviously AP&P wanted to get him back to work. It was a pretty clear cut situation," said Baird.
Burr is facing six felony and two misdemeanor charges, including attempted aggravated robbery and aggravated assault with a dangerous weapon. He is being held in the Cache County Jail.
Burr appeared in 1st District Court on Monday, and prosecutors have offered him a plea settlement. He is scheduled to appear in court again on Monday.