In Eastern Kentucky, you remember where you were when shots rang out on I-75. With the lone suspect still on the loose, it’s hard to forget.

A search for Joseph Couch, the Kentucky man suspected of opening fire on vehicles on Interstate 75 and injuring five people, entered its fourth day Tuesday as officials scoured Daniel Boone National Forest using helicopters, drones and canines.

The suspect accused of shooting five people on Interstate 75 near London, Kentucky, on Saturday was previously arrested this year after police say he threatened to kill a man and his dog.