The state attorney general's office filed 73 criminal counts Friday against Grass Valley real estate broker and lawyer Thomas Hastert, who state officials charge filed false paperwork, embezzled fees and "brazenly deceived" investors and borrowers of $20 million.The charges come after almost 18 months of investigation by city, county and state authorities, a process that involved hundreds of interviews " and frustrated his alleged victims.A warrant for Hastert's arrest was issued Friday. That afternoon, a special agent from the state attorney general's office and an investigator from Nevada the County's district attorney's office were looking for Hastert, whose whereabouts were …