Forensic science - Session 4 - Exit Ticket

Why is securing a crime scene important?

• To keep the media away

• To prevent evidence loss or contamination

• To speed up the investigation

• To allow more people to enter freely

Which scenario demonstrates why strict evidence guidelines are necessary?

• A CSI collects fingerprints and sends them to the lab the same day.

• A detective interviews a witness who recalls details clearly.
  
  

• A piece of evidence is handled without gloves and becomes contaminated.

• A botanist studies plant matter found on a suspect’s shoes.

Which of the following examples BEST demonstrates cross-transfer of materials?

• A suspect’s blood on their own clothing.
  
  
  

• A victim’s hair found on the suspect’s jacket.

• Soil tracked outside the crime scene by officers.

• A fingerprint left by a CSI during evidence collection.

Which situation BEST shows how intensity and duration of contact affect evidence transfer?

• A hair falling from a suspect onto a carpet.
  
  
  

• A handshake between two people transferring skin cells.

• A violent struggle leaving fibers, blood, and fingerprints behind.

• A fingerprint left on glass that is later wiped away.

A district attorney is called to a crime scene. Why might this step be necessary?

• To analyze trace evidence.
  

• To record photographs of the scene.

• To interview family members.

• To approve or advise on obtaining a search warrant.