this Act may be used to pay the salary, benefits, bonuses, or expenses of a Department of Justice employee who is found to have retaliated against a whistleblower or suppressed an employee’s constitutional rights under the First Amendment. 592. (a) None of the funds made available by this Act may be used to conduct an interview in connection with an investigation of a Federal offense, or an investigation in which the agency is assisting a State, local or Tribal law enforcement agency, unless such interview is recorded using electronic audio recording equipment. (b) Subsection (a) shall apply with respect to custodial and noncustodial interviews, but shall not apply with respect to— (1) communications with confidential informants