I did not find Christopher but I did note that his original birth certificate was not replaced by an "adopted birth certificate" -- indicating this was an open adoption and the records would not have been sealed. That means you should theoretically be able to actually look at the adoption file in El Paso County and see what it says. I did do a search for him using the name you gave and...obviously I didn't find him because of a name change. I also looked for any Christopher born on that date in El Paso to see if I could pick up some secondary birth cert with a different surname but found none.

Hope this helps.