From what I've read, Palmieri did not testify in the Clinton e-mail investigation, and has not been granted immunity (yet). This could get interesting indeed.
There have only been five individuals who have testified which received immunity thus far:
- Cheryl Mills, Clinton aid
- Heather Samuelson, lawyer
- John Bentel, ran the State Dept. information resources mgmt. office
- Bryan Pagliano, tech specialist who set up/maintained server in Clinton's NY home
- Paul Combetta, computer specialist for a private firm/maintained Clinton's email setup