When a cigar shop clerk told Adam Zaborowski on Friday he had to wear a mask in the shop, the 35-year-old angrily refused. Instead, he grabbed two stogies, stormed outside — and then pulled a handgun and shot at the clerk, Bethlehem Township, Pa., police said.

The next day, cornered near his home, Zaborowski allegedly fired at police with an AK-47, sparking a wild shootout with at least seven officers that ended with him shot multiple times and under arrest.

...
In recent weeks, police say arguments over masks have led to the vicious beating of Trader Joe’s employees in New York, the fatal shooting of a Family Dollar store security guard in Michigan, and the shooting of a McDonald’s worker in Oklahoma.
https://www.washingtonpost.com/nation/2020/08/03/mask-mandatory-pennsylvania-shooting-police/