Module 8 Lab questions Essay Example
What physical evidence did you find at the victim’s home?
A space heater, some shattered glass, a thing of matches, and burned flooring.
Describe the process that you used to take a sample of the puddle-shaped burn pattern on the floor. Why did you also take samples from the portion of the floor that was not burned? scraped it up with a chisel, and collected both burned and not burned to compare for traces of chemicals.
What evidence did the space heater provide? What did the evidence indicate?
It probably started the fire, it was on at the time of ignition, but it wasn't the cause of the fire.
What information did you gain from the pictures taken at the scene?
The shape of the burned area, and glass shatter, and three others that were inconclusive.
To whom did the fingerprints on the match box belong? What characteristics of the fingerprints helped you to determine they were a match? How long does the average IAFIS search take?
They matched the neighbour.
Why is there a charcoal strip inside the containers that you used to collect the floor pieces?
To absorb gasses.
Why are these pieces saved after the solution has been prepared for the GC? in order to redo the test if it's bad.
What elements were present in the gas chromatograph from your puddle sample? How did this differ from the control graph?
There were the control chemicals and gasoline. There wasn't gasoline in the control.
While performing the autopsy to determine if the victim died in the fire, what signs of inhalation did you look for? Based on the graph, what percentage of carboxyhemoglobin in the blood is deadly?
18% is deadly. The amount he had was significantly less than that.
How does the spectrometer work? What does the absorption of light waves help you to determine? How did you use the calibration curve to determine the blood alcohol content?
It sees how much light is absorbed into the molecules. It takes the light from the alcohol molecules to see how much
A space heater, some shattered glass, a thing of matches, and burned flooring.
Describe the process that you used to take a sample of the puddle-shaped burn pattern on the floor. Why did you also take samples from the portion of the floor that was not burned? scraped it up with a chisel, and collected both burned and not burned to compare for traces of chemicals.
What evidence did the space heater provide? What did the evidence indicate?
It probably started the fire, it was on at the time of ignition, but it wasn't the cause of the fire.
What information did you gain from the pictures taken at the scene?
The shape of the burned area, and glass shatter, and three others that were inconclusive.
To whom did the fingerprints on the match box belong? What characteristics of the fingerprints helped you to determine they were a match? How long does the average IAFIS search take?
They matched the neighbour.
Why is there a charcoal strip inside the containers that you used to collect the floor pieces?
To absorb gasses.
Why are these pieces saved after the solution has been prepared for the GC? in order to redo the test if it's bad.
What elements were present in the gas chromatograph from your puddle sample? How did this differ from the control graph?
There were the control chemicals and gasoline. There wasn't gasoline in the control.
While performing the autopsy to determine if the victim died in the fire, what signs of inhalation did you look for? Based on the graph, what percentage of carboxyhemoglobin in the blood is deadly?
18% is deadly. The amount he had was significantly less than that.
How does the spectrometer work? What does the absorption of light waves help you to determine? How did you use the calibration curve to determine the blood alcohol content?
It sees how much light is absorbed into the molecules. It takes the light from the alcohol molecules to see how much