[GovernmentShrinker]

How? Many of the criminals who have gone from job to job in the health care industry have used different names to avoid detection. For licensed positions like nursing, identity theft is an easy way around background checks. This particular guy apparently benefitted from some "privacy protection" law which prevented previous employers from making his history available to other prospective employers, so he didn't even need to use multiple names -- but if he'd needed to, he would have.

[BenLurkin]

"This particular guy apparently benefitted from some "privacy protection" law which prevented previous employers from making his history available to other prospective employers . . ."

Yes, that and fear of libel lawsuits.