ROCK HILL — A Rock Hill man angry about the increasing cost of his groceries was still behind bars Tuesday after police said he threatened a man and woman with a box cutter when he saw them pushing a shopping cart Monday afternoon.

William Ashford Robinson Jr., 44, is charged with offering violence, according to a Rock Hill Police report.

The woman, 34, and man, 38, were pushing a shopping cart full of groceries while walking on Pinewood Road, near South Anderson Road, when a man asked them what they were doing pushing a shopping cart.

Robinson, sitting in a white pickup, told the couple the cart didn’t belong to the woman, the report states.

When the man said, “that guy’s got problems,” Robinson drove his truck in front of the two, blocking them from walking, the report states. He got out of the car, according to the report, and took out a box cutter.

When police confronted Robinson, who made comments about “transients” stealing shopping carts, he claimed that he was only joking around.

When officers arrested him, he kept making comments about transients and the cost of his groceries going up. He was still held at the Rock Hill jail on a $500 bond Tuesday morning.