1. BLOOD ANALYSIS

2. BLOOD AT THE CRIME SCENE

3. Large spots - the blood was travelling at a relatively low velocity
Small spots - the blood was travelling at a relatively high velocity. (More force equals smaller splatter)
Elongated drops - victim was moving, their speed relative to the amount the spots are stretched and how far they are spaced apart. (Also indicates directionality)
Void in otherwise uniform splatter - something blocked the blood spray.
Contact - large stain on a surface caused by contact with a bloody object.
Cast-off - straight, elongated lines of splatter indicating that blood was thrown by a moving object in a change of direction. (Can show how many times a victim was struck)
video

4. Neither anti-A or anti-B
Blood Typing
Karl Landsteiner in 1901
Blood type:
Antigens on red cells:
Antibodies in serum: A
Anti-B B
Anti-A AB
Neither anti-A or anti-B O
Neither A nor B
Both anti-A and anti-B O A B AB
43-45%
40-42%
10-12%
3-5%
O+ 39% O- 6%
A+ 35% A- 5%
B+ 8% B- 2%
AB+ 4% AB- 1%