As I see it, there are three primary pieces of evidence in hand on the subject: (1) former wartime OSS agent Douglas Bazata claimed to have arranged the assassination of Patton, with a polygraph test showing no sign of deception; (2) Patton's medical condition was improving but he died suddenly and mysteriously while in hospital; and (3), the road accident that put Patton in the hospital was suspicious and pertinent records are almost all missing.
These do not add up to proof that Patton was murdered but do sustain a reasonable suspicion to that effect. Further investigation by historians may yield a definitive conclusion.
The Democrats needed you on the Intelligence Committee. Crazy Land, sorry.