TULSA, Oklahoma - Prosecutors presented evidence at Shannon Kepler's fourth murder trial Thursday that they said proves Jeremey Lake did not have a gun when he died.

The prosecution called several witnesses to the stand, including two Tulsa police officers and the medical examiner who performed Lake's autopsy.

The medical examiner testified for more than two hours. 

The most notable moment is when she repeatedly said there was absolutely no evidence on Lake's body to suggest he had handled a gun the night of the shooting. 

Kepler's defense revolves around the fact they say Kepler only pulled the trigger because Lake pulled a gun on him.

We did not hear from Shannon's daughter Lisa Kepler. She testified first in the last trial.

She was dating Lake before he died.

For the first time in all four of Kepler's trials, the jury may hear from Josh Mills.

Mills was a man living with Lake at the time of the shooting.

Mills was was sitting on the porch and may have seen the shooting happen, prosecutors said.

Witness testimony will continue Friday morning.