South Florida police quietly ran facial recognition scans to identify peaceful protestors. Is that legal?

Scenes of solidarity between police and protesters were common in the South Florida demonstrations after George Floyd’s murder. Here, Florida Highway Patrol officers take a knee alongside Vell Remy (center) and Capt. Roger Reyes during a protest near the Glades Road I-95 exit in Boca Raton on Monday, June 1, 2020. (John McCall/South Florida Sun Sentinel)