A contractor from Greenfield admits he accepted thousands of dollars from homeowners, then failed to do the work.  Thomas Krivitz entered guilty pleas to charges of theft by contractors in Milwaukee County last month.  He has been found guilty of the same crime in Racine, Washington, and Waukesha counties.  In Milwaukee, investigators say Krivitz stole more than 25-thousand dollars from three families.  He is scheduled to return to court May 24th for a restitution hearing.  His victims say they are hopeful they will be able to recover at least part of the money they lost.