'Idol' winner David Cook's brother dies of cancer

LOS ANGELES -- Adam Cook, the eldest brother of "American Idol" winner David Cook, has died from brain cancer at his Terre Haute, Ind., home. He was 37.

David Cook announced the Saturday death at the 12th annual Race for Hope 5K in Washington, D.C., where he was serving as grand marshal. The singer says the cause of death was a brain tumor. The death was first reported by People.com.

Adam Cook was a lawyer from Terre Haute, Ind., who battled cancer for more than a decade. He famously cheered for his singing sibling in the audience of the popular Fox signing competition's seventh season finale in 2008.

Julie Henricks, a friend of the Cook family, said Adam Cook died at his home in Terre Haute, home, where hospice nurses were helping his wife, Kendra, care for him. She said the couple has two children.

Adam Cook had decided to stop his chemotherapy treatments early this year after they failed to help his advanced brain cancer, Henricks said.

"He was so sick and so worn out he just made that decision. That was his choice. It was because he was just so tired," she said.