Howard K. Stern was caught in a bathroom burning a pill over a spoon in order to inject Anna Nicole Smith, according to her former bodyguard.
Maurice Brighthaupt took the witness stand in the case again Stern and two other doctors and revealed how he saw him inject his client on a number of occasions.
And he even saw Smith gulping Chloral Hydrate - one of the substance which killed her - straight from the bottle.
"I saw him inject Anna maybe four or five times," Brighthaupt told the courtroom in Downtown Los Angeles.
"I saw her trying to give herself an injection too."
On one occassion in the Bahamas in 2006 just after her son died, Brighthaupt claims he walked in on Stern preparing to inject Smith.
"There was a burned spoon," he told Judge Robert J Perry. "Anna was in the bedroom. When I walked in it was in the middle of being burned. "I saw him drawing up liquid from the spoon, it being cooked. I saw, lighter, spoon, heat, liquid, withdrawl."
He also admitted it was in pill form before being burned and claimed Stern told him he was doing it this way because Smith could not swallow the tablets and it would be "ingested quicker" directly into the blood stream.
Brighthaupt said he knew Smith was taking Chloral Hydrate but that the way she was administering it became out of control.
He also claimed when he went to see her in the Bahamas in 2006 following the death of her son, Daniel, she was swigging the medication straight from the bottle.
"At the beginning she would use a spoon," he told the court. "I saw her use a spoon maybe twice. Then it was bottle to mouth. A gulp."
He also revealed how Smith had deteriorated into a state of depression in the Bahamas.
"She was somber. She was sick. She was out if it," he admitted. "She spent a lot of time sleeping. She had just lost her son and she was in mourning. So she was always in bed."
During the testimony, Stern shook his head and bit his fingernails while taking notes.
The other two doctors, Dr. Sandeep Kapoor and Dr. Khristina Eroshevich - who are also accused of administering drugs to an addict - looked directly ahead at the witness stand.
As Stern left the courthouse he was asked what he thought about the witnesses statements to which he simply replied, "Just wait."
The preliminary hearing will continue tomorrow when Larry Birkhead is expected to take the stand.