On the witness stand for the defense Thursday, a forensic pathologist analyzed the medical reports of Deedy and Kollin Elderts.
Click here to watch the report.
Deedy is facing murder charges for killing Elderts in a Waikiki McDonalds in 2011.
The doctor says the by-product of cocaine found in the liquid in Elderts' eyeball can have the effect of increased aggression and hyper-activity.
The prosecution points out the concentration was very low and may not have even affected Elderts' behavior.
Closing arguments are slated for Tuesday in the murder re-trial of federal agent Christopher Deedy.
Click here for more on the retrial.