EPI Investigations is a full-service investigations agency offering a broad range of investigative services to businesses in Sioux Falls and SD.

EPI Investigations is a Sioux Falls, South Dakota-based private investigative agency owned and operated by Nathan Fredrickson. His professional experience includes over a decade of work in corporate and private investigations, risk management, covert surveillance and special project management. As a corporate investigator, Fredrickson has provided investigative services in over 400 employee fraud, workers’ compensation claims and criminal investigations. The EPI Investigations Team also include...

EPI Investigations is a Sioux Falls, South Dakota-based private investigative agency owned and operated by Nathan Fredrickson. His professional experience includes over a decade of work in corporate and private investigations, risk management, covert surveillance and special project management. As a corporate investigator, Fredrickson has provided investigative services in over 400 employee fraud, workers’ compensation claims and criminal investigations. The EPI Investigations Team also includes experienced investigators with regional and federal law enforcement expertise who expertly perform comprehensive research and investigations, covert surveillance, and many other investigative services for EPI's private, business, insurance and legal clients.