By Brian Maass Click here for updates on this story ARAPAHOE COUNTY, Colorado (KCNC) — Shannon Lofland, a 21 year veteran of the Arapahoe County Sheriff’s Office, resigned this week in the midst of a department internal investigation into her performing in adult videos, jobs she says she took “out of desperation.” The veteran deputy told CBS News Colorado she turned to performing in adult videos because “I was desperate, I was drowning. I…