The short answer is no, and understanding why makes it clear that no amount of searching is going to change that outcome.
WITSEC, the federal Witness Security Program administered by the United States Marshals Service, has never had a protected individual found by someone they were hidden from. That is not an accident or a lucky streak. It is the result of a program specifically engineered to make people unfindable. New identity, new location, severed ties to everything from the previous life, including public records, employment history, and family connections. The infrastructure behind it is substantial and the Marshals take the integrity of the program seriously because lives depend on it.
If someone has been placed in WITSEC, there is no database to search, no FOIA request that will produce their location, and no back channel that reliably leads anywhere useful. People who have tried, including individuals with significant resources and motivation, have not succeeded.
The argument that someone is a victim set up by the system is a separate legal matter entirely. If there is a genuine claim of prosecutorial misconduct or wrongful placement, that has to be pursued through legal channels, meaning an attorney filing the appropriate motions in federal court. That is a long and difficult road, but it is the only legitimate path that exists.
Any service or individual claiming they can locate someone in WITSEC is either mistaken or running a scam. Save your time and money.