Braulio Castillo, a former IRS contractor who came under fire during a congressional investigation last year, was arrested Tuesday in connection with the March 20 death of his estranged wife, according to Loudoun County authorities.

Castillo, 43, of Ashburn, is charged with first-degree murder and is currently being held at the Loudoun County Adult Detention Center without bond, according to the Loudoun County Sheriff’s Office.

The victim, Michelle G. Castillo, 43, was found dead at her home on Belmont Station Drive in Ashburn shortly after 9 a.m. on March 20, authorities said. Deputies first responded to the residence after receiving a call asking that they check on Castillo, according to the sheriff’s office.

During the inquiry, Loudoun investigators executed multiple search warrants at two locations and conducted door-to-door canvasses throughout the area, authorities said.

Castillo was a witness at a House hearing last summer after a congressional investigation found that he had improperly claimed service-disabled veteran status in 2012. That claim stemmed from an ankle injury suffered during a fall in 1984, while he was the U.S. Military Academy Preparatory School, according to a report by the Federal Times.

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