In this learning object the student will learn how to measure a stain and calculate angles of impact. Determining the angle of impact for bloodstains takes advantage of the trigonometric functions (Sine function).

A mathematical relationship exists between the width and length of an elliptical bloodstain which allows for the calculation of the angle of the impact for the original spherical drop of blood.

Given well formed stains we can accurately measure the width and length by simply dividing the stain along it’s major and minor axis. The opposite halves would be generally equal to each other which aids in establishing the impact angle.

Learners watch video clips demonstrating the correct procedures for police officers to follow when entering and clearing a room.

Students will learn how to document bloodstains using roadmapping equipment materials

Learners examine radial and concentric fractures in glass to determine the sequence of the impacts.

Video based Learning Object showing passenger vehicle and light duty truck Event Data Recorders (Airbag Control modules and Powertrain COntrol Modules).