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An Omaha businessman killed the woman he was living with and then fatally wounded himself late Tuesday afternoon, according to authorities.

Jonathan Scott Hartley, 61, shot Ashley N. Stephens, 27, the Douglas County Sheriff’s Office said.

Stephens was found dead at the scene, and Hartley was taken to the Nebraska Medical Center in critical condition. Authorities announced Wednesday evening that he had died.

Stephens was the mother of two young children, according to a GoFundMe page set up for her burial expenses.

Hartley owned and operated ALS Affiliates Inc., a company that trained emergency medical providers across much of Nebraska in basic and advanced life support. As a result, he was widely known among paramedics, firefighters and others who provided emergency medical services. Hartley also had children and at least one grandchild.

No one else was at the home during the shooting, authorities said.

No other personal information on the two was immediately available.

The shooting took place at Hartley’s home at 4602 N. 134th Ave. in the Hillsborough subdivision of suburban Douglas County.