The alleged killing of an Australian man in Oklahoma by three teenagers — one of whom told police they committed the crime to alleviate boredom and chose the victim at random — has shocked people in the U.S. as well as in his native country.

Chris Lane, 22, was shot dead Friday in Duncan, Okla., a city of roughly 23,000 people about 82 miles south of Oklahoma City, said Duncan Police Chief Danny Ford. Three teenagers were arrested for the crime several hours later, with one of them telling police that they decided to shoot someone because they were bored, Ford said. He called the crime highly unusual for Duncan, which doesn’t “average a murder a year.”