Lois McArthur MurderLois McArthur Murder

Make sure you have the lab information and colored pencils.

Crime SceneCrime Scene

Fingerprint MatchupFingerprint Matchup

• Using the packet of rap sheets given, compare the fingerprint from the scene to each of the suspects.

• Record your match up on the data sheet and cite specific fingerprint characteristics that match.

Handwriting AnalysisHandwriting Analysis

• Using the packet of rap sheets given, compare the handwriting from the “suicide note” to the writing sample from each of the suspects.

• Record your match up on the data sheet and cite letters that match up.

Fiber AnalysisFiber Analysis

Fiber gound at the scene

FibersFibers

Cotton Fiber Course Cotton Fiber

FibersFibers

Above: Nylon Fiber

Below: Polyester Fiber

FibersFibers

Rayon Fiber

Fiber ConclusionFiber Conclusion

• Draw all of your sketches on the data sheet.

• Match up the fiber found at the scene to the type of cloth and look to see which of the suspects were wearing that fabric.

Hair SamplesHair Samples

Hair Found at the Crime Scene

Hair SamplesHair Samples

Lois McArthur’s Hair Sample - Victim Catherine McArthur’s Hair –

The victims mother

Hair SamplesHair Samples

Luise’s Hair Maria R’s Hair

Hair SamplesHair Samples

Mike H’s Hair Ted’s Hair Sample

Hair Sample ConclusionsHair Sample Conclusions

• Draw all of your sketches on the data sheet.

• Match up the hair found at the scene to the hair samples from each of the suspects and the victim.

Blood SamplesBlood Samples

Identify each persons blood type and record your results on the data sheet.

Final Conclusions & ReportFinal Conclusions & Report

• Based on your findings, write your investigator’s report being sure to include:• Who did it? (murderer)• Why did they do it? (motive)• Evidence to convict the suspect• Approximate time of the murder