Bullet Holes in Glass Notes on Provided Notes

Bullet Holes in Glass Notes on Provided Notes Page

What can you tell by looking at bullet holes in glass? • Direction of shooter – Were they inside or outside of the window? • Sequence the shots were fired in? – By looking at the radial fractures • Angle the shooter was standing from – Did the shooter fire facing straight on to the glass or were they standing to the right or left?

. 22 Ruger Video

Entrance vs. Exit Holes . 22 caliber Entrance hole . 22 caliber Exit hole What are the differences?

9 mm Video

Entrance vs. Exit Holes 9 mm Entrance hole 9 mm Exit hole What are the differences?

. 45 Colt Video

Entrance vs. Exit Holes . 45 caliber Entrance hole . 45 caliber Exit hole What are the differences?

. 41 Smith and Wesson Magnum Video

Entrance vs. Exit Holes . 41 caliber Entrance hole . 41 caliber Exit hole What are the differences?

Entrance vs. Exit Holes • How can you tell from which direction a gun was fired? – Entrance holes are neater and clean cut. They tend to be smaller. – Exit holes are large and messy. Bullets are fired with a lot of force. This force carries pieces of glass through the hole and out the other side. Glass fragments tend to stick out at the exit hole.

Sequence of Shots • How can you tell the order in which shots were fired? – Look at the radial fractures. – An existing fracture will stop a new fracture. – Older fractures will have longer radial fractures. Once new shots are fired, their radial fractures will end at the radial fractures of older shots.

Sequence of Shots – What’s the order? B A C

Shots Fired from Different Angles

Shots Fired from Different Angles Shot from the Left Shot from the Right These are entrance holes fired from different angles. What’s the difference between shots from the left and shots from the right?

Shots Fired from Different Angles Shot from the Left Shot from the Right These are exit holes fired from different angles. What’s the difference between shots from the left and shots from the right?

Shots Fired from Different Angles • What differences will be seen in shots fired from different angles? – Chipping around exit holes • Chipping will be even if fired from straight on – If a bullet enters from the right, there will be more chipping on the left. There will be short radial fractures on the right and longer radial fractures on the left; it would be reversed in shots fired from the left. • To determine which angle a shot was fired from, use test shots in same type of glass.