Did some searching and found out how to get your DNA deleted from the military DNA Data base, follow the instructions here.
https://health.mil/Military-Health-T...uction-Request
The question is did they ever share it with the FBI, Combined DNA Index System (CODIS)
https://www.fbi.gov/services/laborat...l-dna-database
Would have to fill out a freedom of information act (FOIA) form to the medical examiner or the FBI to see if your DNA got shared between the systems.
https://www.foia.gov
Don't expect it to be fast