Lyndell’s Bakery sits on the corner of Broadway and Willow Avenue, in the heart of Somerville’s Ball Square. Inside this quaint neighborhood shop, rows of Italian sweets, cupcakes, donuts and specialty cakes sit on display, encased behind glass counters; high up a wall, on a shelf behind a side counter, there’s a picture of murdered MIT police officer Sean Collier, and a large check for $6,200.

Made out to the Somerville Auxiliary Police Department and dated November 1, 2013, the check was courtesy of Lyndell’s Bakery and friends and family of the fallen police officer, gunned down on the MIT campus the night of April 18, 2013, three days after twin bombs were detonated at the finish line of the Boston Marathon, killing three and injuring another 264.

On Thursday, the sixth day of the trial of surviving Marathon bombing suspect Dzhokhar Tsarnaev, jurors heard the testimonies of Dr. Renee Robinson and Dun Meng.

The latter of the two, Meng, was the victim of a carjacking he says was carried out by Dzhokhar and his older brother Tamerlan Tsarnaev. On the stand Meng testified that the elder Tsarnaev brother – who died later that night during a shootout in Watertown – admitted to setting off the bombs and said that it was he who killed Collier.

Before Meng took the stand, Dr. Robinson, the medical examiner who performed Collier’s autopsy, described his fatal wounds.

A few hours after Meng and Robinson provided testimony, almost six miles away from the federal courthouse in South Boston, only a pair of customers peruse the rows of sweets inside Lyndell’s Bakery. Collier’s picture and the $6,200 check made out to the SAPD sit behind a glass shelf, above a row of cakes.

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