“The Manson Family Massacre” (** out of four) was a muddled psychodrama about a struggling musician (Brendee Green) who moves into the famous Manson house at Cielo Drive and the film flashes back to Manson and the grisly murders from decades ago. Ploddingly told story has an atmosphere of elegant eeriness but nothing much to build on it; by this point is there really anything more to tell- or to scare us with- about the Manson murders? Green nicely underplays but is unable to enrich this tired material