Walter Reed, who savored a reputation for being hard on criminals during his three decades as a north shore district attorney, now knows what it’s like to be on the wrong side of a jury.

Reed, 69, was convicted on 18 of 19 federal counts Monday night after a two-week public corruption trial in which prosecutors portrayed him as a greedy, grasping conniver who repeatedly sought to use his public office for private gain.

Reed was district attorney of St. Tammany and Washington parishes for 30 years, leaving office in January 2015. He was indicted three months later.

His son, Steven Reed, was convicted on three of the four counts he faced.

The jury deliberated for about four hours before returning with their verdicts.

U.S. District Judge Eldon Fallon set sentencing for Sept. 15.

The lone count on which the jury found the pair not guilty involved a charge of money laundering. The government said the elder Reed had used White Oak Productions, which provided services for a 2012 campaign fundraiser, to funnel $5,000 to his son’s company, Globop Inc. But Ed White, owner of the company, testified that Steven Reed did do work at the event, filling in for him because White had a conflicting job in Florida that night.

On the other counts, the court official reading out the verdict sheet sounded like a broken record as both Reeds stood stoically at the defense table in similar postures, eyes forward, hands clasped loosely in front of them.

The jury agreed that the two had conspired to commit one count of wire fraud by paying another Steven Reed company, Liquid Bread LLC, $29,400 for bar services that the defense claimed he provided at the 2012 fundraiser headlined by the band America.

Walter Reed had testified that his son provided half the liquor for the event, and the two figured the amount based on an estimated attendance of 2,500. He said he paid his son for drinks, not bottles of alcohol.

But testimony from liquor distributors who donated booze for the event and staffers who said their goal had been to get all the alcohol for the event donated for free threw doubt on that claim.

The jury also found both Reeds guilty of another money laundering count involving $5,000 that caterer Cayman Sinclair provided to Liquid Bread. Sinclair testified that Walter Reed instructed him to write a cashier’s check to the company, something that Reed vehemently denied on the stand.

Glenn Burns, an attorney for Steven Reed, said his client didn’t know where the money came from and just deposited it into his account.

But Steven Reed’s accountant testified that the younger Reed used the money to pay down a loan for a bar that had failed — a loan for which Walter Reed was the guarantor. The same accountant testified that her client lied to her about where the money had come from.

The Reeds’ deception was a theme the prosecution sounded frequently in Monday’s closing arguments, saying their efforts to hide what they were doing showed they were engaged in a conspiracy.

Assistant U.S. Attorney Marquest Meeks said that when Walter Reed took the stand Friday, he struggled to explain himself. “You don’t have to do that when telling the truth,” Meeks said.

Walter Reed’s lead defense attorney, Richard Simmons, has long argued that the federal government was prosecuting matters that should have been dealt with under state campaign finance law, calling that portion of the case a federal overreach.

But the prosecution put on dozens of witnesses aimed at showing that Reed used campaign money for his own personal spending and to benefit family members, and the jury found him guilty of all seven of those wire fraud charges.

The other major leg of the case involved Walter Reed taking $30,000 a year from St. Tammany Parish Hospital that the prosecution and hospital officials said was meant for the District Attorney’s Office, not Reed personally. The jury found him guilty of all five of those mail fraud counts.

Finally, Walter Reed was convicted for making false statements on his federal income taxes for four years, 2009 to 2012, in part by not declaring campaign money he had converted to private use as income.

U.S. Attorney Kenneth Polite issued a statement saying: “The defendants’ actions were not innocent ‘mistakes,’ as Walter Reed claimed in his testimony. They were crimes. As a community, we are tired of hearing, and accepting, excuses from public officials who violate the public trust to enrich themselves. The time for excuses is over.”

In St. Tammany, officials characterized the verdict as a step forward.

“The jury obviously heard what they needed to hear to bring back such a decisive verdict,” parish President Pat Brister said. “The justice system worked as it should, and we can begin to put this dark moment behind us and move on.”

Warren Montgomery, Reed’s successor as DA, said, “The jury has spoken. No one is above the law. Let’s continue moving forward.”

Sheriff-elect Randy Smith, who ran as a reformer, said the verdict sends a message that public corruption is coming to an end in the parish.

“It’s always unfortunate when a public official falls prey to greed, and while the conviction of our former district attorney might seem like an embarrassment to some, it also makes clear that the people of St. Tammany Parish will not tolerate such things — not anymore,” Smith said.

The two Reeds’ defense team made it clear that the defendants are not giving up. Simmons said they will appeal. Burns said, “This is not over.”

Outside the courthouse, Walter Reed said he was surprised by how quickly the jury came back and is more worried for his son than for himself.

Steven Reed declined to comment, but he thanked a reporter for asking.

Federal sentencing guidelines probably will call for a sentence of between eight and 12 years, depending on how the financial loss to the government is calculated, said lawyer Matt Coman, a former federal prosecutor. Judges are not bound by the guidelines, but they must calculate them before imposing sentences.

Often, judges take other factors into consideration, such as a defendant’s age and the likelihood that he might commit another crime.

Some observers have speculated that Reed’s past boasts of racking up long sentences for criminals could play poorly with the court. But Matt Chester, another former federal prosecutor, said he doesn’t think Fallon will punish Reed specifically for being a tough DA.

However, Chester said Fallon typically does take a dim view of white-collar defendants who have advanced degrees, high public positions and other advantages. When Fallon sentenced former New Orleans City Hall tech vendor Mark St. Pierre to 17 years in prison for his role in a kickback scheme, for instance, he harped on the various privileges St. Pierre had enjoyed.

Follow Sara Pagones on Twitter, @spagonesadvocat.