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A jury convicted Thomas Joseph Gross on May 6, 2022, of first-degree premeditated murder in the death of his mother, Ina Gross, in Manatee County, Florida, and he was sentenced the same day to life in prison without the possibility of parole. His trial had begun May 3, 2022, and jurors deliberated for roughly an hour.

Ina Gross, 78, lived on Hyacinth Place in Lakewood Ranch on Florida's Gulf coast. Her husband, Dr. Samuel Gross, was a pediatric hematologist and oncologist who had worked in Cleveland and at Shands in Gainesville before becoming director of the Walt Disney Memorial Cancer Institute in Orlando. He died in 2010. The couple had four children, including Ellen Gerth, who lived north of Tampa. Their son Thomas was 58 in January 2012 and lived in Herzliya, Israel, with his wife and young daughter. A dual Israeli and United States citizen, he also had two sons from an earlier marriage. Ina Gross's estate was worth more than 4 million dollars, and Thomas Gross had borrowed heavily from his parents over the preceding years.

Thomas Gross was staying at his mother's house during a visit from Israel and was booked on an early flight from Tampa on January 9, 2012. Deputies and rescue crews were called to the house at 5:37 a.m. Ina Gross was found dead in the garage with multiple knife wounds to her throat. The knife, taken from her kitchen, was nearby. There was no forced entry, and nothing had been taken. Her son said he overslept, went to investigate why the dog was in the garage, found his mother, called 911 and attempted CPR. The Manatee County Sheriff's Office concluded that she died from homicidal violence and came to believe the scene had been arranged to suggest a suicide or robbery.

Manatee County Sheriff's Office detectives interviewed Thomas Gross hours after his mother's body was found. They told him he was not under arrest and was free to leave, then read him his rights partway through. He described arriving in Gainesville the previous Thursday for a memorial lecture endowed in his father's name. He also recounted a Sunday lunch in St. Petersburg with his sister and brother-in-law and an afternoon football game he watched after returning. Gross denied killing his mother, said he had no motive, asked to take a polygraph and said he wanted to return to Israel. Detectives questioned him about the body's position, a shoe rack that had fallen on her and his account of performing CPR.

No unidentified DNA was recovered. The only unidentified fingerprint was traced to an air conditioning technician who had worked at the house the previous year. Toxicology found Ambien and Benadryl in Ina Gross, with the Ambien at a level described as five to ten times a therapeutic dose. She had no prescription for Ambien, but her son did. His laptop showed activity during the hours he said he was asleep. Investigators cited money as the motive. Court documents listed loans of about 690,645 dollars from his parents, and his mother had told him she could not keep lending to him. Thomas Gross returned to Israel while the case remained open.

An arrest warrant was issued in 2014, and a Manatee County grand jury indicted Gross on a charge of premeditated first-degree murder in March 2015, when he was living in Israel. Israeli police arrested him in Herzliya in December 2017 after the Israeli justice minister directed prosecutors to pursue extradition. He was extradited and booked into the Manatee County jail in April 2019, where he was held without bond.

No appellate ruling in his case has been publicly reported.

The video is a police interview-room recording that runs about 140 minutes. It shows the interview itself, without narration or a presenter.

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Part 2 of 2 of the recording described above.