Serology+JO

Three questions to answer:** 1. Is it blood?
 * Forensic Characterization of Bloodstains

2. From what species did the blood originate?

3. If the blood is human, how closely can it be associated with a particular individual?

Presumptive Tests** - suggests but does not confirm the presence of blood; __indicates that other__ tests should be performed
 * 1. IS IT BLOOD?

- negative result means the substance **IS NOT** blood

- positive result means the substance **IS LIKELY** blood