Editor's note: This story has been updated from its original version to include a comment from investigators.

Officials in eastern Iowa have charged an Iowa City man with first-degree murder in the killing of his wife, a longtime administrator at the University of Iowa health system.

Roy Carl Browning Jr., 67, is charged with the April 5 killing of JoEllen Browning, 65, who died from multiple stab wounds. The murder happened on the same day that the Brownings were to meet with a banker who planned to reveal that Roy Browning Jr. had removed money from a joint account and had taken out high-interest loans without his wife's knowledge, according to a criminal complaint filed in Johnson County.

Authorities told the Iowa City Press-Citizen they had conducted 100 interviews during the investigation. The charge against Roy Browning Jr. was filed Monday afternoon, court records show. He is being held on a $5 million bond.

JoEllen Browning was the director of operating budgets and an employee at the University of Iowa Health Care since 1977.

On the morning of April 5, Iowa City police officers were dispatched to the Brownings' home, at 114 Green Mountain Drive, on the east side of the city, for a reported "unresponsive female."

"It's a complicated investigation, a complicated case," said DCI Special Agent in Charge Rick Rahn, who helped spearhead the months-long investigation. "But the guys have done well so far."

Autopsy results from the Johnson County Medical Examiner found JoEllen Browning's death was a homicide and that she died of stab wounds.

What allegedly happened April 5

Roy Browning Jr. called Iowa City police about 7 a.m. that day, reporting that his wife was unresponsive in her bedroom, the complaint says. She had been stabbed in the front and back of her torso and on her left hand; her death was ruled a homicide.

Investigators found no evidence of forced entry into the home, but saw blood in the master bedroom and shower, court records show. A sample taken from JoEllen Browning's fingernail showed DNA from Roy Browning Jr. on her finger.

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Authorities also say financial records show that Roy Browning Jr. had taken money from a joint bank account and placed it into a personal account for himself. JoEllen Browning on April 1 texted her husband, asking him about account discrepancies and told him she wanted to talk with their financial institution, officials learned after reviewing cellphone and email records.

She set up a meeting and informed her husband via text April 4 that the couple was to see a banker the following day. Roy Browning Jr. acknowledged the meeting, but that same day purchased gloves and towels from a nearby paint supply store, the complaint states. An employee told investigators he gave Roy Browning Jr. additional gloves that day. Video surveillance put him at the store less than an hour after being informed of the visit with the financial institution.

Investigators found out that Roy Browning Jr. had taken out at least four different loans of $4,000 in Illinois, with an interest rate of more than 300%. He told the company not to contact his wife about the checks, court records show.

Officials also spoke with the banker who was planning to meet with the Brownings on April 5, the day JoEllen Browning's body was discovered.

"JoEllen was preparing for tax season and had found some problems with Roy and JoEllen's accounts..." the complaint states. "The representative was prepared to tell JoEllen at this meeting that one of their savings accounts was depleted and Roy had taken out loans of which JoEllen was not aware.

"The representative was prepared to tell JoEllen that an account JoEllen thought was active never actually existed."

Records showed that Roy Browning Jr. used his personal checking account to pay more than $17,600 toward the balance on a credit card under JoEllen's name shortly after his wife died. The credit card was still being used after her funeral April 12, officials found.

"JoEllen Browning had a retirement and life insurance policy worth in excess of $2 million," investigators wrote in their complaint. "In reviewing finances, records show that JoEllen Browning was financially stable and Roy Browning did not have a revenue source."

Investigators never found the items Roy Browning Jr. bought at the paint supply store. Attorney Leon Spies filed documents saying he is representing Roy Browning Jr., who is next due in court at 2 p.m. Nov. 8.

Tyler Davis can be contacted at tjdavis@dmreg.com or on Twitter @TDavisDMR.