Looks like one of the defense's final witnesses wasn't ready to play nice with prosecutor David Walgren. During an intense cross examination Thursday, Dr. Robert Waldman accused Walgren of putting words in his mouth. The judge stepped in and told Dr. Waldman that that's how cross examinations usually work.

Walgren asked the judge to strike several of Dr. Waldman's responses because he was being "unresponsive." When Walgren asked him how many hours each week he did dialysis work, it took Dr. Waldman about a minute and a half of back and forth before he could explain.

"What you're asking me is extremely non-specific and I'm telling you honestly I don't measure," Dr. Waldman said.

It seems like Walgren was trying to imply that because Dr. Waldman also practices dialysis, he may not be most knowledgeable expert for this case. Dr. Waldman testified earlier that Michael Jackson was dependent on the painkiller Demerol, given to him by his dermatologist Dr. Arnold Klein.

Walgren was also able to attack the addiction specialist's credibility by getting him to admit that he is not board certified in addiction medicine.

Complete courtroom coverage of the Conrad Murray trial airs live on HLN from gavel to gavel. It’s also on In Session on truTV from 9 a.m. to 3 p.m. ET every weekday.

Posted by: HLN's Amanda Sloane, In Session's Graham Winch
Filed under: Conrad Murray • Drugs • Michael Jackson • Testimony • Witnesses