I'm with Robbie, that HR was part of the Morgans group, a conglomerate that owned HR LV, The Shoreclub South Beach, The Mondrian in South Beach, and other boutique hotels in Scottsdale, London, San Francisco, and more.
http://www.morganshotelgroup.com/company.aspx
Unless he owned major shares in the group, its unlikely his motive was a decrease in business. Vegas hurt more after 9/11 than now.
Most folks take their own lives because of personal desolation, who knows what demons were plaguing him. I hope he finds solace.