Knoxville (WVLT) - The search for suspects in the shooting of a cab driver last month is now part of a murder investigation.
Fifty-five-year-old John Cooper died following the shooting.
Police say he was shot in the back after an apparent argument with two women.
The incident happened in the Western Heights area of Knoxville.
If you have any information about the case, police ask you to call, 215-7275.