Los Angeles, California (CNN) -- Prosecutors are expected to rest their case Friday in the seven-week-long trial of model Anna Nicole Smith's boyfriend and two doctors. They are expected to call their last witness Friday afternoon. And defense lawyers said they will likely not call any witnesses. Smith's boyfriend Howard K. Stern and two doctors are on trial for allegedly conspiring to feed her drug addiction and using false names to obtain the drugs. One expert witness for the defense, a pain medications expert, has already testified for the defense. Dr. Perry Fine testified early because of scheduling issues. Jurors watched a video on Wednesday of the Playboy model singing, kissing and bathing with her infant daughter just two months before her February 2007 death.
@highlight
Defense lawyers says they will not call any witnesses
@highlight
Prosecutors are expected to rest their case Friday
@highlight
Video of Smith and her baby bathing was intended to show drug impairment
@highlight
Judge has hinted he might drop some charges
@placeholder smiled several times as he watched the video from his seat at the defense table.
They repeated that exchange several times before @placeholder said "She made a funny face, she pointed to the camera."