allegations of illegal and inappropriate behavior within their ranks. the claims involve the diplomatic security service known as dss. basically, the secret service, the security force that protects the secretary of state and ambassadors around the world. they're also in charge of investigating any case of misconduct. cbs news' john miller reports according to an internal state department memo, several recent investigations were influenced, manipulated, or simply called off. among the allegations, sexual assault and the solicitation of prostitutes. the inspector general is apparently continuing to investigate whether that cover-up took place. that does it for this edition of "andrea mitchell reports." follow the show on twitter. >> hi, andrea. in our next hour, the justice department now searching for the former cia contractor who admits