Landis Coulter, 26, triggered the automated reader Wednesday morning, the Marietta Police Department said in a statement.

He had been wanted on charges of aggravated assault and robbery, according to arrest warrants filed in Cobb County.

After a license plate associated with Coulter led to a notification, “officers were able to locate and arrest the suspect that may have otherwise continued hiding in plain sight,” the statement said.

Authorities did not disclose the location of the fixed reader, which was “quietly installed” several months ago.

Read more on the AJC.