Doug and Patricia Rohrick are embroiled in a custody battle over their great-granddaughter. The Colorado couple told reporters that the El Paso County Department of Human Services denied their requests to adopt 10-month-old Saya because they were medical marijuana patients. [caption id="attachment_6697" align="alignright" width="240"] Doug Rohrick with great-granddaughter Saya[/caption] Mr. Rohrick said that he and his wife have been open about their legal medical use since the beginning of the adoption…