Joseph Angelo Mannino was hired as a data entry clerk at Lehigh Valley Hospital in North Carolina in 2005 - 13 years after injecting his college roommate with a deadly cocktail of drugs.
He spent two years in prison on manslaughter charges. Mannino eventually became a registered nurse at the hospital before another employee alerted the hospital to his past indiscretions.
Lehigh Valley Hospital spokesman, Brian Downs says that Maninno lied to the hospital about his criminal history on both his job and school applications. A criminal background check was conducted on Mannino at the time of his hire in 2005, but it wasn't comprehensive and didn't cover convictions in other jurisdictions.
The hospital now runs national criminal background checks and Maninno admitted to hiding his conviction. His license was revoked in 2009.