6th CSI Lesson

Partner: Crisann Moh (4)

Experiment 1

Resulting bloodstains (height of 10cm)
Experimental set-up
Resulting bloodstains (height of 60cm)
Resulting bloodstains (height of 100cm)
Resulting bloodstains (height of 150cm)

Height: Length 1st attempt)/ Length 2nd attempt)/ Length 3rd attempt (cm)

10cm: 0.8/0.8/0.8

30 cm: 1.1/1/1.2

60cm: 1.3/1.5/1.3

100cm: 1.8/1.8/1.9

150cm: 1.6/1.6/1.8

Experiment 2

Resulting bloodstains from the whole experiment

Angle(degrees): Length/ Width

1st 10: 1.5/1.4

2nd 10: 1.6/1.5

3rd 10: 1.7/1.6

1st 30: 1.8/1.2

2nd 30: 1.5/1.4

3rd 30: 1.9/1.2

1st 50: 1.8/1.1

2nd 50: 1.9/1.1

3rd 50: 1.8/1.1

1st 70: 3.7/0.8

2nd 70: 2.4/1.1

3rd 70: 4/0.8

Part 2

1st attempt

2nd attempt

Crisann and I favoured our 2nd attempt more as it was done more systematically.

From afar, the victim was shot in his leg, explaining the high-velocity blood splatter (in blue). With the shot, the murderer had probably intended to incapacitate the victim so that he could have his way with him. This revealed the cruel nature of the murderer as he wanted to make his victim suffer immeasurable pain before he died. When he was shot, the victim probably fell to his knees and the murderer took the opportunity to ram the back of his skull into the wall once, causing a flow pattern of blood (green at the top left-hand corner of the paper). Medium velocity impact splatters were also evident, indicating that he had probably been beaten. A fingernail probably caused the long contact bloodstain (swipe pattern that runs from the right of the image to the bottom). The thick transfer bloodstain that ran through the flow pattern of blood was probably caused by a blunt object.