Frank is right. I spent about 30 minutes searching and looking at various sites with information about the 1929 film. I am convinced that it is a feature film, 80 minutes long with sound. The video portion of the film is apparently lost, but the audio portion may be available.
Scott Yanow's error is not such a big deal, in view of the confusion in the filmography sites. His account of Don Murray's death is consistent with what others have said and even with the nature of the head injury in the police report quoted by Norman.
The statement in the police report "Murray was found on the street unconscious Thursday night. From the nature of his wound police were inclined to believe he was struck by a blunt instrument rather than by a hit-and-run automobile. At the inquest it was brought out the musician had over $100 in cash on his body removing theft as a possible motive. " is not difficul to interpret. My guess is that, normally, when someone is found unconscious and lying on the street, two hypotheses come to the mind of a cop: the individual has been mugged and robbed or he/she was the victim of a hit and run. Few people fall down and crack their heads, but it happens. Presumably, in a highly intoxicated state, one does not have sufficiently fast reflexes to use the arms to prevent damage, especially if one is falling backwards.
Unless some new information surfaces, my conclusion is there is nothing fishy with Don Murray's death.