INDIANAPOLIS (WISH) — There are about 1,600 convicted sex offenders in Marion County. Forty of them remain unregistered and missing.

It is those 40 who are the targets of a new effort which began Monday that will take them from the shadows of the streets to the bright lights of big billboards. The hope is to put them back behind bars.

One of the billboards displaying the sex offenders is Indianapolis’ only electronic billboard, located at the state fairgrounds.