Registered sex offender wanted by Wausau Police back in custody

WAUSAU, Wis. (WSAW) - The Wausau Police Department says a sex offender accused of tampering with his GPS monitoring equipment is back in police custody.

Robert E. Johnson, Jr. was wanted by the Wisconsin Department of Corrections. An arrest warrant was issued Monday.

Wausau Police said Johnson turned himself in and is back in custody.

Johnson had been sentenced to prison for first-degree sexual assault of a child and reached his mandatory release date in August. He had been living in transitional housing near the Marathon County Courthouse.