Gemahl Maika - "secret" witness- what secrecy?

Murdered man was due to testify on death threats in cocaine trial

''The accused persons have the current financial and material means, resolve and incentive to prevent witnesses from giving evidence against them, and members of the syndicate are actively engaged in pursuing that end,'' Inspector Greg Randall alleged in the affidavit.

So with Gemahl Maika a "secret" witness but what secrecy?
Crime pays again.