MA v Lindsay Clancy - Maureen Hartnett - Mass State Police

Main points from the testimony of Maureen Hartnett, a Forensic Scientist II with the Massachusetts State Police Crime Laboratory, on day 6 of the Lindsay Clancy trial:: Professional Background and Role • Experience & Education: Hartnett has worked at the crime lab for approximately 10 years. She holds a bachelor's degree in biology and a master's degree in forensic science. She undergoes regular training, competency evaluations, and yearly proficiency testing. • General Responsibilities: As a civilian forensic scientist, she works in tandem with law enforcement to process crime scenes. Her primary focus is documenting, locating, and collecting biological evidence such as blood, semen, and saliva. Forensic Testing & Collection Protocols • On-Scene Screening: Hartnett utilizes preliminary chemical screening tests (such as Kastle-Meyer for blood) to identify potential biological fluids at a scene. This informs which samples to collect using deionized water and Q-tip swabs, cuttings, or by taking the entire object. • Laboratory Confirmatory Testing: To definitively confirm the presence of blood, Hartnett conducts an immunographic assay test back at the lab. This test reacts with antigens and antibodies to confirm the substance is blood and indicate if it is human (though it can react with primate blood). • DNA Preparation: Once blood is confirmed, samples are cut up, re-labeled, and forwarded to a separate DNA unit within the laboratory for genetic analysis. Timeline of Evidence Collection & Observations • January 24, 2023 — South Shore Hospital: Hartnett examined Lindsay Clancy in the emergency room, observing and collecting swabs of red-brown stains on Clancy's hands. She also received Clancy's cut-off medical clothing to enter into the lab. • January 25, 2023 (Early Morning) — 47 Summer Street Residence: • Basement: Hartnett documented a red-brown carpet stain (Stain A, later labeled Item 3-3), which screened positive for blood. She also collected a pair of pajamas and a pink bathrobe. • Master Bedroom (Second Floor): She documented five specific stains (Stains B through E on-scene, and Stain F in the yard). • Stain B: Floor cluster between the bed and mirror (screened positive, swabbed). • Stain C: Cluster on a full-length mirror (screened positive, swabbed). • Stain D: Inside windowsill (screened positive, swabbed). • Stain E: Nightstand beside the bed (screened positive, swabbed). • Stain F: Red-brown staining on the snow in the backyard (collected). • January 25, 2023 — Brigham and Women's Hospital: Hartnett returned to examine Lindsay Clancy and collected fingernail swabbings. • June 15, 2023 — Second Summer Street Search: Hartnett returned five months later to investigate the exterior shingles below the master bedroom window. • A stain directly under the windowsill (Stain A) screened negative. • Stains B, C, and D on the shingles screened positive. Hartnett collected the shingles and corresponding swabs. • She did not perform laboratory confirmatory tests on these shingles to avoid destroying the highly degraded, weather-exposed, and limited material, opting instead to preserve the full sample for DNA testing. Key Laboratory Analysis Results • Confirmed Blood: Back at the laboratory, Hartnett confirmed the presence of blood on Stain A (basement floor), Stain B (bedroom floor), Stain D (windowsill), Stain F (backyard snow), and on Stain A found on the blade of a recovered knife. • Unconfirmed Stains: Some documented areas (such as the mirror cluster Stain C, stains on the door near the doorknob, and select exterior window stains) were either only screened at the scene or not tested further. • Exercise Bands: Hartnett processed three exercise bands (including a yellow band and a black band). She took separate swabs from the handles/ends and the centers of each band to determine if different individuals had made contact with the separate areas. These samples were successfully dried and sent to the DNA unit. 00:00 - MA v Lindsay Clancy - Maureen Hartnett - Mass State Police 01:39 - Crime scene response methods 03:58 - South Shore hospital sampling 05:14 - Basement stains at Summer Street 08:32 - Master bedroom red-brown stains 14:15 - June exterior shingle collection 18:05 - Lab blood confirmation and DNA 23:09 - Cross on testing limits Lindsay Clancy Trial Playlist:    • MA v Lindsay Clancy - Jury Selection Day 1