An unemployed 31-year-old Indian Hills man was sentenced Monday to probation, and ordered to pay nearly $50,000 in back child support at $257 per month until he finds a full-time job.Mark Duncan pleaded guilty to failure to support or maintain a child, admitting he hadn't paid child support since it was ordered in 2005 to meet his obligation toward his daughter, now 11.District Judge Michael Gibbons suspended 30 months in Nevada State Prison, and placed Duncan on five years probation.He may not consume alcohol or controlled substances and is subject to unannounced search and seizure.Attorney Tod Young said he was …