Both Stone and Robinette keep referring to Ron Borland's fingerprints being on the murder weapon as compelling evidence against him. However the gun belonged to Borland and was registered to him, it only makes sense his fingerprints were on it. His fingerprints being the only prints on it proves nothing and is weak circumstantial evidence at best, it could easily be explained by someone else using the gun while wearing gloves, or wiping it down after using it, with Borland handling it at some point after the murder.