Day 20 - June 5, 2024

David Yannetti cross-examines Ashley Vallier on the evidence handling and collection timeline of tail light debris. He establishes that Vallier did not examine the clothing items themselves, only debris separated from them, and that she does not know which trooper delivered the clothing to the lab. The core of the cross focuses on contrasting the collection dates and sizes of plastic pieces: smaller fragments collected by Trooper DiCicco on February 3rd (five days after the incident) versus progressively larger pieces collected by Trooper Proctor on February 8th, 11th, and 18th — up to three weeks later. Yannetti asks about the evidence bags before a March 14 lab receipt; the court sustains that question before Vallier answers. The cross concludes with the reconstructed tail light and the remaining missing section.

In a brief 19-utterance redirect, ADA Lally addresses two points from Yannetti's cross-examination. Vallier identifies Maureen Hartnett as the analyst who transferred the clothing debris to Vallier's unit, while also confirming that she does not know who collected the evidence or when or how it was collected. Vallier describes observing the tiny plastic pieces visually and through a stereo zoom microscope. Lally then asks broadly whether all of the pieces she testified to fit mechanically onto the tail light housing from the defendant's vehicle, and Vallier agrees; her detailed direct testimony identified item 3-1 and the pieces making up piece one as having once been together as a larger unit.

Christina Hanley, a forensic scientist and unit supervisor at the Massachusetts State Police crime lab with 16 years of experience, testified about her examination and comparison of glass and plastic evidence. She found a physical match between a broken drinking glass (item 3-2) and six of nine glass pieces recovered from 34 Fairview Road (item 7-12), establishing they were once part of the same object. She also found that a glass piece from the vehicle's bumper (item 3-3, piece E) was consistent in physical and instrumental properties with glass found on the ground (item 7-14). Finally, she determined that clear and red plastic debris scraped from the victim's clothing (item 7-18.18) was consistent in color, microscopic appearance, and instrumental properties with plastic from the defendant's passenger-side tail light (item 3-1).

Alan Jackson methodically walked Christina Hanley through her glass comparison results using a four-category framework: the drinking glass (3-2), bumper glass pieces (3-3), nine scene glass pieces (7-12), and a single scene glass piece (7-14). Jackson established that while six of nine scene pieces matched the cup, none of the bumper glass physically matched the cup. Hanley testified that 7-14 had no physical match to the cup or any 7-12 piece, while bumper piece E was consistent with 7-14 in physical and instrumental properties; that consistency did not identify a unique source. Jackson attempted to introduce a chain of custody document (BV) and a visual summary chart (WW), but both were met with objections and judicial limitations discussed at sidebar.

In a brief redirect, ADA Lally attempted to ask Hanley about general commonalities of plastic and glass materials, but the question was sustained as beyond the scope of cross-examination. Lally then had Hanley reconfirm that six of the nine glass pieces from the scene (item 7-12) matched the drinking glass, and that piece E from the vehicle bumper (item 3-3) was consistent with clear glass found on the ground at 34 Fairview Road. The defense had nothing further, and Hanley was excused.