Mercer County Sheriff Jeff Grey speaks at a Thursday press conference. Grey gave updates on the current progress of investigations into the murders of Robert and Colleen Grube one year ago and the murder of Melinda Schinn earlier this month.

On Thursday, Grey called together members of the media to provide an update on both investigations.

He began with the Shinn murder case which centers on 40-year-old Daniel Charles Martin. Shinn and Martin lived together in a mobile home in Rockford and argued during the evening of Nov. 7. The next morning, Rockford Police were called to the trailer where Shinn’s body was discovered. Martin was nowhere to be found, although his vehicle was later located in Fort Wayne. The effort put into trying to find Martin is still continuing.