 Devlin regarded none of the cases mentioned by Hallworth as equally strong as the Morrell case, despite it being six years old, that the exhumations and subsequent post-mortems yielded nothing of interest but provoked further press rumours and, in an investigation initially into Mrs Hullett's death covering a ten-year period, the police were unable to find a better case than the Morrell one.An alternative, and more valid, criticism of the prosecution than Hewett's is that it prepared and presented its case badly.Its case relied heavily on police evidence and the testimony of expert witnesses, neither of which had been thoroughly tested in the pretrial period.