KANSAS, May 24 - Second defendant pleads guilty to related charges

MARION – (May 24, 2022) – A Wichita man has been sentenced to more than 22 years in prison in connection with the disappearance and death of a Sedgwick County woman in April 2020, Kansas Attorney General Derek Schmidt said today.

Robert Bruce Mans Jr., 50, of Wichita, was sentenced yesterday in Marion County District Court to 228 months in a Kansas Department of Corrections facility on one count of voluntary manslaughter and 43 months for one count of aggravated battery. Senior Judge Mark S. Braun sentenced Mans to serve the sentences consecutively, and required him to register as a violent offender. Mans pleaded guilty to the charges on April 18.

Mans was convicted of the charges in connection with the death of Shalan Niccole Gannon, 27, of Wichita. Authorities allege Gannon was killed on or about April 8, 2020. She was reported missing on April 11, and her body was found in June 2020 in the Ninnescah River in rural Sumner County. Mans was formally charged in October 2020.

A second defendant associated with the case, Jason Kirkby, 39, of Wichita, pleaded no contest yesterday to one count of criminal desecration and was sentenced to 12 months of supervised probation.

The case was investigated by the Kansas Bureau of Investigation, the Wichita Police Department, the Marion County Sheriff’s Office, the Marion Police Department, the Butler County Sheriff’s Office and the Sumner County Sheriff’s Office.

The case was prosecuted by Assistant Attorney General Jessica Domme, of Schmidt’s office, and Marion County Attorney Joel Ensey.