Gary Mendell was running a successful hotel investment firm when he lost his son to addiction about six years ago. After that, the direction of his life changed.
In the late 1980s, Mendell started HEI Hotels & Resorts which owns and operates properties under some of the biggest brands, including Starwood, Marriott, and Hilton.
"I was a CEO running businesses, and my older son, Brian, struggled with addiction for eight years," Mendell told CNBC's "Squawk Box" in an interview this week.
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