Roy Coons Trial Day 2 Agent Charly Castelbuono

TL;DR

DNA expert testifies about the results of Y-STR testing and compares them to DNA profiles found on evidence submitted in a criminal investigation.

Transcript

it would be Charlie Casper wanna okay meets little child see that's what we were that's what we realized that towards be miss charlie castle Ilana please state your name and spell your last name for the court reporter they're actually your first and last name to the court reporter my name is Charlie ch AR ly Castille bono CAS te l bu o n o miss cas... Read More

Key Insights

• 🇾🇪 Y-STR testing was conducted on evidence in a criminal investigation.
• 🧬 The results of the testing were inconclusive for several DNA samples.
• 🧬 The witness explained the statistical analysis used to determine the rarity of DNA profiles.
• 👥 Different ethnic groups may have different frequencies of certain DNA profiles.

Questions & Answers

Q: What is the witness's position and role in the Tennessee Bureau of Investigation?

The witness is a special agent forensic scientist who conducts DNA testing for the bureau. They are responsible for analyzing DNA evidence in criminal investigations.

Q: Is Y-STR testing conducted by the Tennessee Bureau of Investigation?

Yes, the bureau started conducting Y-STR testing in July 2016.

Q: Were any DNA samples from the evidence conclusively linked to specific individuals?

No, the witness found inconclusive results for several DNA samples from the evidence.

Q: Can the witness explain the difference between Y-STR testing and STR testing?

Y-STR testing focuses on the Y chromosome and is used to identify male-specific DNA, while STR testing looks at all the DNA in a sample and can identify both male and female DNA.

Summary & Key Takeaways

• The witness is a special agent forensic scientist who conducts DNA testing for the Tennessee Bureau of Investigation.

• The Tennessee Bureau of Investigation started Y-STR testing in July 2016 and the witness is one of the experts who conducts this testing.

• The witness examined various items of evidence from a criminal investigation into the death of Johanna Ortega and found inconclusive results for several DNA samples.