With her 42-year-old son looking on from the back of a courtroom, Donna Horwitz on Wednesday pinned the 2011 murder of her 66-year-old ex-husband on the Jupiter couple’s only child.

“I’m glad that my dad was alive long enough to know that what comes around goes around,” attorney Grey Tesh told a Palm Beach County jury, indicating he was quoting Radley Horwitz’s reaction to his father’s death. “This was payback for everything he did not only my mother but to me.”

It is the second time Tesh, who represents Donna Horwitz, has pointed the finger at Radley to explain how Lanny Horwitz ended up naked, his body riddled with bullets, on the bathroom floor of the home the dysfunctional family shared in the exclusive Admiral’s Cove community.

Despite hearing identical claims, another jury in 2013 convicted Donna Horwitz of first-degree murder in her husband’s death. Her conviction and life sentence was overturned last year by the Florida Supreme Court.

Setting the stage for this week’s trial, it ruled that prosecutors improperly violated Horwitz’s constitutional right to remain silent by telling jurors that she refused to talk to Jupiter police when they arrived at the home to investigate the shooting.

Donna Horwitz, 70, and her son didn’t make eye contact as her attorney and Assistant State Attorney Aleathea McRoberts gave starkly different accounts of Lanny Horwitz’s death. Dressed in a maroon suit with her hair cut short, Horwitz looks relaxed. She is using a amplication device to hear the testimony.

After marrying and divorcing Lanny Horwitz twice, Donna Horwitz was hoping for yet a third reconciliation, McRoberts said during opening statements. Donna Horwitz had persuaded her aging mother to give Lanny $200,000 so he wouldn’t have to sell the heavily mortgaged house. Lanny, who was a lawyer who invested in real estate, had even agreed to let Donna and her mother live in the house with him.

But despite that, Lanny Horwitz didn’t hide his relationship with another woman. In fact, he was leaving that morning with the other woman to travel to his other house in Ashville, N.C.

“I’m not taking it anymore because you are Mr. Meanie,” McRoberts said, using the name Donna used to describe her ex-husband in diaries that were discovered after the murder. “I’m not going to take it anymore.”

The couple and their son were all gun lovers. Donna Horwitz was an accomplished target shooter, McRoberts said. Radley had operated a gun-selling business before he was convicted of a weapons violation and ordered to spent five months in federal prison.

Tesh claimed Radley blamed his father for his arrest. Further, Radley, who had a young daughter to support and no job, needed the $500,000 he could collect from his father’s life insurance police.

“Who really has the motive? he asked.

The trial continues this afternoon.

EARLIER STORY:

For the second time in four years, a Palm Beach County jury Wednesday will begin hearing evidence to help them decide whether Donna Horwitz fatally shot her ex-husband in a jealous rage in their upscale Jupiter home or whether someone else committed the 2011 murder.

The 14 jurors, selected after an all-day hearing Tuesday, will return to court this morning for opening statements. They will then hear the first of roughly a dozen witnesses prosecutors plan to call to prove the 70-year-old murdered her 66-year-old ex-husband, Lanny, in their home in the exclusive Admiral’s Cove community.

The star witness during the trial is again expected to be the couple’s now 42-year-old son, Radley. During Horwitz’s 2013 trial, that ended in a conviction and life sentence that were later overturned, her attorney Grey Tesh said Radley stood to inherit $500,000 from his father’s life insurance policy. Further, Tesh claimed Radley, who harshly criticized his father, once bought a handbook on how to get away with murder.

Tesh, who has added attorney Joe Walsh to the defense team, suggested Radley or a hitman he hired could have fired the shots that killed the lawyer and real estate developer.

Donna Horwitz married and divorced Lanny twice yet continued to have a relationship with him. In diaries, she called him “Mr. Meanie,” and bemoaned his hurtful relationships with other women.

Her conviction was overturned last year by the Florida Supreme Court. It ruled that jurors shouldn’t have been told she refused to talk to investigators when they arrived to find Lanny dead in the bathroom of the home the couple shared even though they were divorced. Prosecutors, the court ruled, improperly used Horwitz’s constitutional right to remain silent against her.

With her once long frizzy hair cut short, Horwitz appeared relaxed on Monday. Wearing a gray pant suit with a black tank top, she smiled and laughed as prospective jurors answered questions. She has remained incarcerated.

The trial could wrap up on Friday, according to Circuit Judge Krista Marx.