Are your techs generalists or dedicated blood bankers? If they are generalists, chances are they are not going 2nd guess BB Mgr. If they are dedicated blood bank techs they should know better. Unfortunately I have known SBBs who would give inappropriate plasmas (gr O to gr A) just because they were thawed. Laziness. Do you have a BBIS? It should have required an override to give the O plasma. Having been an inspector/assessor for AABB and still a CAP team leader I would think these issues should have been flagged in your quality plan and subsequently made their way to lab management and hospital quality folks. Don't be derelict in your duty to your performance program AND your patients. I'm certain your Medical Director should be in the know as he/she is ultimately responsible. I would not bring up this individual's past history (though how you discovered this would be an interesting aside). Don't let your lab's quality suffer because of an individual's poor performance, both the manager and the tech involved. The transfusion of inappropriate plasma should have resulted in a Biological Product Deviation to the FDA. Is this in your purview? I would recommend jumping immediately on errors of this type as soon as they are found. I also would recommend going directly to the Medical Director as it seems your manager has some serious BB judgement issues. In the past I have commented to a Medical Director that one would not want to practice Laboratory Medicine in jail. The Feds can take you out in handcuffs if they think you are culpable (rare but they do have an enforcement arm). I'm being kind of verbose here but the bottom line is as the quality person for your BB, don't hesitate to call a spade a spade. Inform lab upper management with your concerns, especially your Medical Director.