Polo Mogul John Goodman Trial Hinges on $200K Bentley

— -- Expert witnesses testifying in the re-trial of polo mogul John Goodman clashed over whether the Bentley he was driving malfunctioned the night he hit another car, pushing it into a canal and killing the driver.

Engineer Luka Serdar told the court on Friday that Goodman's $200,000 car was not working "as designed at the factory by the Bentley engineers" when he hit a Hyundai driven by Scott Wilson. The crash pushed Wilson's car into a canal, where the 23-year-old drowned.

Serdar's testimony came after another engineer, Karl Stopschinski, testified for prosecutors. Stopschinski said that Goodman's car was operating in the way that it was designed to be driven on the night of the crash.

Goodman testified on Wednesday that his car's brakes malfunctioned.

Prosecutors countered that Goodman was drunk after working up a $272 tab partying at The Players Club in Wellington, Florida, saying he registered a blood alcohol level of 0.177, more than twice the legal limit, hours after the crash.

Goodman admitted ordering 18 drinks at the club -- but he said he only had three of those drinks.

The rest were for others, he said.

He also claimed he didn’t drink until after the crash, when he left the scene and stumbled upon a friend’s home, where, he said, he drank heavily.

"In order to be acquitted, Mr. Goodman merely has to show that at the time of the accident, his blood alcohol level cannot be proven by the prosecution and that he drank his alcohol after the accident," Michael Kraut, a criminal defense attorney, told ABC News.

Goodman was convicted in 2012 for Wilson’s death and sentenced to 16 years behind bars, but the verdict was thrown out because of juror misconduct. Goodman's Bentley was also ordered to be destroyed after the conviction.

His second trial will resume Monday, with defense attorneys expected to call a traffic crash expert to the stand, followed by closing arguments.

Goodman has pleaded not guilty to DUI manslaughter and vehicular homicide.