Blood Evidence

Which of the following WOULD NOT be a task for a Bloodstain Pattern Analyst?

• photograph crime scene

• write reports

• determine cause of death

• lab work (determine gender/ethnicity from sample)

When a blood droplet reaches terminal velocity, which of the following are true? THERE MAY BE MORE THAN ONE ANSWER!!!

• downward force of gravity (Fg) = upward force of airdrag (Fair)

• the droplets will continue to accelerate (speed up)

• the diameter of the blood droplets reach maximum size

• the droplets are at maximum speed and will not accelerate (speed up)

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which droplet was likely donated from an angle straight above (90 degrees)?

• far left

• middle

• 2nd from right

• far right

What force results in a droplet shaped like this?

• Fair (airdrag)

• Cohesion

• Fg (Gravity)

• Fapplied (applied force)

Which droplet angle would be categorized as PASSIVE GRAVITATIONAL SPATTER?

• 90 degrees

• 60 degrees

• 20 degrees

• 10 degrees

Would the transfer be a SWIPE or WIPE?

• Swipe

• Wipe

Blood evidence (untested) at a crime scene would be categorized as;

• circumstantial / individual

• circumstantial / class

• direct / individual

• direct / class

Blood evidence on an item would be stored (packaged) in;

• an airtight metal container

• ziplock bag

• paper bag

• paper envelope

Linear blood patterns produced by the swinging of a weapon in an arcing motion...

• transfer stains

• passive spatter

• swipe

• castoff

Extensions projecting from the central droplet;

• scallops

• spines

• tranfer

• castoff