Amy Loughren is a former registered nurse who is known for assisting in the arrest and prosecution of serial murderer Charlie Cullen. Before his apprehension, Cullen and Loughren were friends who both worked the night shift in the ICU at Somerset Medical Center in New Jersey. Loughren was a single mother of two children and hiding her cardiomyopathy from her employers, with some help from Cullen, in whom she confided. In 2003, Loughren was approached by detectives who suspected Cullen of poisoning hospital patients. The patient who triggered law enforcement interest was Florian Gall. After consulting with her 11-year-old daughter, Loughren agreed to assist law enforcement.As part of the investigation into Cullen, Loughren met with him at a diner, wearing a wire. The evidence from the meeting allowed police to then arrest Cullen. After he was arrested, Loughren encouraged him to make a full confession, which then supported his convictions for 29 murders.