BOSTON -- Experts took the stand on Tuesday in the medical malpractice case filed by former Patriots coach Charlie Weis.

Weis -- who left New England to become Notre Dame's head coach -- is suing two surgeons he alleges botched his care after gastric bypass surgery five years ago.

An expert witness hired by Weis' legal team took the stand on Tuesday. Dr. Alan Wittgrove said one of the physicians on trial, Dr. Richard Hodin, made the wrong decisions when Weis took a turn for the worst after undergoing gastric bypass surgery in 2002.

Wittgrove said Hodin should not have prescribed a blood thinner for Weis.

"He should have operated on him to stop the bleeding. And in doing so, he would have repaired the leak that was also there," Wittgrove said.

Weis is expected to take the stand on Wednesday.

The first trial ended in a mistrial in February after a juror collapsed and the Massachusetts General Hospital doctors being sued rushed to his aid.