At least two county supervisors and two county pension officials were issued grand jury subpoenas this week to testify in May, several county sources confirmed. The FBI took an interest in the pension package several weeks ago, according to county Supervisor Robert Krug, who said Friday he had been interviewed by a federal agent. The federal probe is the second criminal investigation into the pension enhancements proposed by the Ament administration and approved by the County Board for most county employees, including elected officials, in 2000 and 2001. When the generosity of the benefits became widely known in January, Ament...