The Florida Supreme Court said Tuesday it cannot freeze foreclosures in the state as requested by a Florida congressman and amid a tempest of allegations and admissions that flawed paperwork has been used to take people’s homes. U.S. Rep. Alan Grayson (D-Orlando) asked the court last week to halt foreclosures being handled by three large Florida law firms under investigation by the state attorney general’s office over handling of foreclosure documents. A fourth law firm under investigation was not mentioned in Grayson’s Sept. 20 letter, but is a concern, a Grayson spokesman said. Clerk of Court Thomas D. Hall wrote Tuesday in a letter to Grayson that the court has no authority under the Florida constitution or court rules to intercede in, or investigate pending cases on the basis of allegations of fraud or wrongdoing.