From a Boulder radio news source:
BOULDER, Colo. (KRDO) -- The Boulder Police Department says a 12-year-old boy was assaulted Monday for carrying a President Trump lawn sign.
Officers were dispatched to reports of an assault near the intersection of Folsom and Glenwood. Police say the boy was riding his bicycle while carrying the President Trump sign. The suspect, a woman in her 20s or 30s, was riding a moped when she drove past the victim and saw his sign.
The female suspect then made a U-turn and assaulted the child because of his political banner, according to police. The woman tried to take the child's banner but was unsuccessful.
Boulder Police say woman assaulted 12-year-old for carrying Trump sign - KRDO
"Reports" plural is used here. Does this mean that there were witnesses?