[Old Professer]

Your graphic shows an angle of 17.5 degrees; that would mean a point of origin for the bullet at 83.45 feet above the ground on the third and fatal shot.

How high was the window ledge on the 6th floor?

[Shooter 2.5]

It's lower than I thought. Apparently that's why he set up the boxes to use as a steady rest. I learn something everytime you people ask me something. Thanks.