The DUI manslaughter trial of a Houston socialite — accused of causing a crash that killed a Florida college graduate — is in the hands of the jury.

Attorneys for both sides finished closing arguments about 3:30 p.m. Houston time.

John Goodman took the stand in his defense at his trial Thursday, saying he was “absolutely not” drunk and that his Bentley malfunctioned when he slammed into a car, killing 23-year old Scott Wilson, ABC News is reporting.

Each side gets 90 minutes to close and the state, beginning with prosecutor Sherri Collins, will split its time, according to Palm Beach Post reporter Jane Musgrave, who is live-blogging the trial here.

Prosecutors say Goodman was intoxicated at the wheel and ran a stop sign, causing the death of Wilson on Feb. 12, 2010, in Wellington, Fla. The engineering graduate drowned after the collision with Goodman’s car flipped his Hyundai into a nearby canal.

Goodman testified that he went to two gatherings earlier that night with friends and had four drinks: a vodka tonic at the White Horse Tavern and then two shots of tequila and a shot of Grey Goose vodka at the Players Club. His Players Club bill shows a tab for more than 10 tequilas and other drinks, but Goodman said he bought a round for friends. When asked if he was impaired, the 6-foot-1 and 220 pound man said, “Absolutely not.”

The Palm Beach Post, which has a live blog of the trial and live video coverage, reported that the Houston millionaire did not realize after the crash that he had knocked a car into the water:

He said he left the Players Club shortly before the crash on a quest for a Wendy’s frosty. After the crash, he said, he didn’t know where he was and certainly didn’t realize that Wilson’s car had tumbled into the canal, where he drowned. “If you knew someone was in the canal, what would you have done?” “I would have done whatever I could have done to help,” Goodman said, over the objection of prosecutor Ellen Roberts.

Goodman is being tried in West Palm Beach, Fla., on charges of DUI manslaughter, vehicular homicide and leaving the scene of a crash. He has pleaded not guilty, and faces up to 30 years in prison if he is convicted.

Palm Beach County Sheriff’s Office Investigative Report