Suspect # 2 is following about 30 feet behind, Bridgestone cap, tan pants are obvious, both exiting or about to exit to the north on Fairfield, which is the direction they came from. (Cambridge a few blocks to the north across the bridge crossing the Charles River).
The second guy about 30 feet behind
(1) looks shorter than Suspect #1,
(2) has a reddish hat, whereas Suspect #1 had a dark blue or black hat and
(3) has a tan lining on his hood, whereas Suspect #1 has a blue lining on his hood.