What will be 'the smoking gun' for this jury in arriving at a verdict?

What will be 'the smoking gun' for this jury in arriving at a verdict?

In the closing arguments, both sides tried to emulate how they envisioned the Colt 22 was used either by Neil to murder his wife and beautiful daughter. Or, by Rachel in a suicide / murder scenario. In this news clip, segments from both the prosecution and state's closing statements are shown demonstrating the placement of the gun. What do you think? How important is the gun, GSR going to be as a contributing factor for this jury to arrive at a verdict.