Thursday morning began outside the courthouse as jurors stepped outside to view the SUV Ross Harris drove to the Home Depot office complex the day his son died.

The SUV was placed on the west side of the courthouse, with the car seat placed inside the rear of the vehicle, in the position it was found in, in that Vinings parking lot where Cooper Harris was found strapped in on that day in June, 2014.

After the jury takes the time to examine the SUV and the car seat, they will return to court, the 15th day of testimony began with a bang.

Immediately after the jury returned from viewing the SUV, lead defense attorney Maddox Kilgore filed a motion for a mistrial, insisting that the jury was unduly biased by the lighting and viewing angles they were permitted to access the vehicle Thursday morning.

After listening Kilgore's statements, Judge Staley quickly denied his motion, just before the morning break.

Late Wednesday morning, after more than three days of contentious testimony, Cobb County Police Detective Phil Stoddard, the lead detective on the case, stepped down from the witness stand. Stoddard's testimony, along with other detectives, punctuated a day of intense exchanges from attorneys on both sides about police motives in the case.

Father Ross Harris faces a number of charges, including malice murder and felony murder in the June 2014 death of his young son, Cooper. The 22-month-old was found dead in the back seat of Harris' SUV in a suburban Atlanta office park. The defense maintains the incident was nothing more than a tragic accident.

PHOTOS | Ross Harris Hot Car Death Trial - Day 15

PHOTOS | Ross Harris SUV shown to jury