Authorities believe a woman in a missing person investigation may be deceased.
The Rapid City Police Department says 21-year old Larissa Lonehill was last seen in Rapid City in October of last year and they began investigating her disappearance in early November.
Police believe her body may have been disposed of within a 100 mile radius of Rapid City.
Lonehill has a two-year old daughter and her family is hoping for closure.
Larissa's mother Lisa Lonehill says, "I miss my daughter every day. We are hopeful that we will be able to find her and I hope and pray that somebody finds it in their heart to come forward to tell the police where she is."
Commander of the Rapid City Police Department Criminal Investigations Division Captain James Johns says, "News of this investigation and reward is going to spread quickly and you can bet that the person or persons responsible are going to be paying attention. We do not want them knowing what specific information we possess in relation to Larissa's disappearance."
Police are offering a $5,000 reward for information leading to the arrest and conviction of any suspect or suspects involved in Lonehill's disappearance.
You can call 394-4124 or text 847411.