The chief operating officer for the High Museum of Art has resigned after an investigation into “financial irregularities.”

Channel 2 Action News obtained a copy of the email sent to board members about Brady Lum’s resignation.

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The Woodruff Arts Center’s Governing Board launched an investigation into Lum’s activity in December and also hired an outside law firm to review it.

“It became clear during the investigation that approximately $600,000 was stolen and we believe Lum abused his executive-level position at the High to access the money and hide what he’d done for several years,” the email states.

The board told the law firm to refer the case to the U.S. Attorney’s Office to determine possible criminal prosecution.

This is a developing story. Check back for updates and tune into WSBTV.com.