GREAT FALLS — The Cascade County Sheriff’s Office said on Thursday that Lane Gibson has been arrested in connection with the investigation into the stabbing death of Terrell Johnson. A news release from the Sheriff's Office states that Gibson, age 20, is facing a felony charge of tampering with witnesses or informants in connection with the homicide investigation. According to the news release, he took these actions after learning that a criminal investigation was underway. Gibson is considered a "person of interest" and is believed to have been with Johnson in the hours leading up to the homicide. Anyone with information about the investigation is asked to call Detective Nick Allison at 406-836-0010 or email him at nallison@cascadecountymt.gov.