A Des Moines man, Rodney Todd Walker, has been arrested in a case of walnut tree theft from many areas in Central Iowa, including Lake Red Rock. The tree thefts, which allegedly occurred between January and April of 2012, are valued at nearly $40,000. Walker also stole scrap metal from Lake Red Rock. He faces $250,000 in fines if convicted of all counts when he stands trial at the end of October.