This is continuous coverage in the trial of Brian Walsh from the Hidden Killers podcast and

true crime today. Now, back to the courtroom. Good afternoon. Good afternoon.

Could you please state your name and spell your entire name for the record? My name is Yoli

J-O-L-I-B-R-E-G-U.

And what is your educational background?

I have a Bachelor of Science in Biology from Boston University

and a Master of Science in Biomedical Forensic Sciences, also from Boston University.

And what is your occupation, ma'am?

I'm a forensic scientist, too, with the Massachusetts State Police Crime Laboratory in the DNA Unit.

And how long have you been there?

Since June 2019.

Can you tell us your responsibilities as a forensic scientist, too? Sure. I perform forensic DNA analysis on evidence samples submitted to the lab.

So my typical work they consist on processing those samples in the lab, doing the data interpretation,

making comparisons with the reference samples, writing reports, testifying in court as needed.

I also do administrative and technical reviews.

And what training have you had for this position?

So in addition to my education during my master's degree, I followed a forensic biology and forensic DNA analysis track.

And then when I got hired, I was trained at the Massachusetts State Police,

specifically in the DNA unit, in forensic DNA analysis.

The training consisted on lectures, reading of relevant literature,

laboratory experience with practice samples, data interpretation,

written and oral exams, followed by competency tests.

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