An Oahu Circuit Court jury on Tuesday found a 28-year-old man, who refused to wear a mask at a COVID-19 testing site, guilty of second-degree assault in the beating of a 71-year-old security guard.

Mackenzie Barefoot punched the security guard on Nov. 17 at The Tom Moffatt Waikiki Shell testing site after the guard told him he needed a QR code to enter the area and requested several times he wears a mask.

The security guard called the police after Barefoot became belligerent, knocked his cellphone out of his hand and punched him in the face.

Deputy Prosecutor Roy Kwon used a new law that makes intentionally or knowingly causing bodily injury to anyone 60 years old or older a Class C felony.

Barefoot faces up to five years in prison when he is sentenced on Aug. 18.

“This verdict sends a strong message that the residents of Honolulu will not tolerate violence against our kupuna,” Honolulu Prosecutor Steve Alm said.

“The victim was only trying to do his job, and we hope the verdict provides some measure of closure for him.”