John Valiante, 22, of Compo South Road, was arrested Tuesday for tampering with an ATM at the Walgreens on Post Road East, causing the machine to malfunction.

Employees at Walgreens reported a suspicious person in the store near the ATM machine and called police. When officers arrived, the workers pointed out Valiante. He was charged with criminal mischief in the third-degree and released on a promise to appear Sept. 17 in Norwalk Superior Court.