The victims were trying to find a parking space when they noticed Swick get into his vehicle and patiently waited for him to exit a space, the Stuart Police Department said in a statement.
Swick reportedly became upset, police said, exited the vehicle and struck the woman, causing her to fall to the ground.
Mark Swick, 47, punched an elderly woman, causing her to fall to the ground, police said.
Mark Swick, 47, of Land O’Lakes, Florida, allegedly assaulted a couple in downtown Stuart, about 40 miles north of Palm Beach, on January 31.
The woman’s 74-year-old husband noticed what happened and got out of his car to defend his wife, said investigators.