Kansas City, Mo. ? Federal investigators are hoping electronic billboards along highways in Kansas, Missouri and Oklahoma will help them nab a suspect in seven robberies in those states.

The most recent heist tied to a man the FBI calls the “Fake Beard Bandit” happened Wednesday in Olathe. The suspect also is believed to have robbed four banks in Oklahoma between May 24 and June 29, one bank in Joplin, Mo., on July 13, and one in Shawnee, on July 25.

He is described as being in his mid-20s to 30s, 5-foot-8 to 6 feet tall, weighing 150 to 180 pounds.

In most cases the robber went inside the bank an hour or two before the robbery wearing sunglasses, then came back later wearing a fake beard and demanded money.