Below is an image of the chart for blood analysis
The suspect that had the same blood type as the blood on the door frame is Suspect 2
2. Yes, as it could very well be theirs
3. The strugle is that: the blood can be mixed with other blood/elements or may be tampered with.
Blood type is a common characteristic, and there are many people in the world who share the same blood type.
However, it is a strong piece of evidence that can be used in conjunction with other evidence, such as DNA evidence, eyewitness testimony, or alibi evidence, to help convict a suspect. Blood evidence can easily be contaminated with other blood, bodily fluids, or other substances. This can make it difficult to interpret the results of blood tests.
See text below
In the lab tests: Use the next chart for blood analysis. Fill out your chart with a + and – to show clumping or no clumping in each blood sample. Blood source Anti-A Serum Anti-B Serum Anti-Rh Serum Blood Type Crime Scene - - + AB- Victim + - + b- Suspect 1 - + + Suspect 2 - Suspect 3
1. Which suspect had the same blood type as the blood on the door frame?
2. Is this match enough to convict the suspect of the crime? Why or why not?
3. What are some struggles forensic scientists may have when collecting and testing blood evidence?