ISO birth brother born October 20, 1953 Denver, CO

Im searching for my birth brother born October 20, 1953 Denver, Colorado at the Mary Donaldson Hospital. Our Birth mother named him David Allen Bell, she resided at the Florence Crittenton Home. I was born in Phoenix, AZ 11/21/1955 at St. Joseph's Hospital. I was named Cheryl Ann Clay (she used my birth father's name) I know of him from my non-ID and confirmed by our birth mother, Dorothea Mae Best - he has no way of knowing about me since I'm 2 years younger PLEASE, help me if you can - I've been searching ever since I found out that I have a sibling!