(Portland, OR)  --  A Gresham man is behind bars, accused of sexually abusing a child.  Forest Grove police arrested 71-year-old Ronald Jordan yesterday at his home in Gresham on charges of first, second and third-degree sexual abuse.  Police began investigating him for child sex abuse in February and believe he may have had additional victims.  He's been known to reside in Washington, Clackamas and Yamhill counties.