A body was discovered in the River Witham at Stamp End, Lincoln, on Tuesday afternoon, 6 February, during a search operation.
Police believe the body to be that of Callum, a 26-year-old Lincoln man reported missing since 4 February.
The search efforts for Callum, who was last seen wearing beige joggers, a top, and Nike Air Trainers, culminated in this tragic development.
Callum's family has been informed of the discovery. Authorities are now awaiting formal identification. A file has been passed to the Coroner for further investigation.
The initial appeal to find Callum was launched on 5 February, expressing growing concerns for his welfare after his disappearance was reported.