WATCH LIVE: Missing Mom Murder Trial – CT v. Michelle Troconis – Day Six

TL;DR

The witness, Lieutenant Colonel Mark Davidson, a blood stain pattern analysis expert, examined the blood stain patterns found in the garage and on vehicles at the crime scene.

Transcript

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Key Insights

• 🏑 Lieutenant Colonel Mark Davidson is an experienced blood stain pattern analysis expert with extensive training and education in the field.
• 🩸 Blood stain pattern analysis is used to determine the origin, sequence, location, and mechanism of blood stains at a crime scene.
• 🩸 Altered stains, such as wipes and swipes, indicate physical changes to the blood after deposition, while regular blood stains follow the laws of gravity.
• 🩸 Drip stains are created by blood droplets falling due to gravity, and transfer stains occur when blood is transferred between surfaces.

Questions & Answers

Q: What is blood stain pattern analysis?

Blood stain pattern analysis is the examination of the size, shape, and distribution of blood stains to determine the mechanisms that created them and provide insights into the sequence, origin, and location of the blood.

Q: How does altered stains differ from regular blood stains?

Altered stains, such as wipes and swipes, indicate that a physical change has occurred to the blood after it was deposited. Regular blood stains follow the laws of gravity and show no signs of movement or alteration.

Q: What is the significance of spatter stains in crime scene investigation?

Spatter stains are created by airborne blood droplets when external force is applied to liquid blood. They help determine the direction, sequence, and mechanism responsible for creating the blood stain patterns.

Summary & Key Takeaways

• Lieutenant Colonel Davidson conducted a blood stain pattern analysis of the garage and vehicles at the crime scene.

• He identified altered stains, such as wipes and swipes, in areas A and B of the garage, indicating movement and a change in the blood after deposition.

• He also found drip stains in area G and transfer stains on the garage door.