DUNCAN, Okla. — Prosecutors filed charges against three teenagers Tuesday after police said the boys randomly targeted an Australian baseball player as he jogged and shot him in the back, killing him, to avoid the boredom of an Oklahoma summer day. Christopher Lane, 22, of Melbourne, died Friday along a tree-lined road on Duncan's well-to-do north side. Two teenagers, 15- and 16-year-olds from the gritty part of the town, were charged with first-degree murder and ordered held without bond.