Fiber Power Lab

In this lab we noticed differences of fibers of fabrics in microscopes.    You can use fiber evidence to identify a source.  We were able to identify an unknown fabric found on a crime scene and figure out a murderer by the clothing worn.  This lab will be helpful if, on a crime scene we find some fiber evidence.  This combined with other evidence will help us find a supposed murderer.

After Burning:

We found that it was hard to tell which was the match to the unknown fiber.  Our notes and sketches weren't very good and we were stuck between two.   The burning was confusing.  It was easier to tell by just using a microscope.  Couldn't notice any patterns of differences between man-made fibers and natural fibers.         Anyway, I think fiber evidence could be useful, but it was kind of hard to understand what we saw, and you would need a lot of other evidence to.

Blood Trajectory Lab

We learned that by using the length (hypotenuse) and width (opposite) of a blood splatter you can use Sine to find the angle of the trajectory, giving you information about the height of the wound, and where the victim and maybe perpetrator were standing.  This lab will contribute to my knowledge for the mission, because if there was foul play and blood was splattered, it can give me info about the crime, such as said above.  This lab enriched my knowledge of sine and taught me that blood can spin and sometimes point to the wrong direction.

Blood Splatter Lab

During this lab I was surprised to find that it seems to me that blood splatters cannot be used as evidence in a crime.  I came to this conclusion because in many of the graphs of blood splatters that I saw, there was not a clear trend of the relationship between the height of the drop of blood and the diameter of the the splatter.  I think you could see how long the blood had sat there, the general area of where the crime happened, and the DNA (which may lead you to a person).  However you can't tell much about the nature of the wound or weapon.  Another reason is not all wounds are the same size so you can't find height based on diameter of splatter if some splatters are from more blood or less.