I'm fairly certain that Wendi was subpoenaed to testify at the trials by the State under Sec. 914.04 and so had use and limited use immunity for that testimony. I'm pretty sure the same would apply if HA and DA receive trial subpoenas from the State -- i.e., they would be compelled to testify (can't take the 5th) and would have given use limited/use immunity. (However, they could be prosecuted if they commit perjury.) I'm copying a December 2022 post from
@BSBC about this topic:
"Immunity statutes like Florida's Sec. 914.04 don't "override" the Fifth Amendment; they are consistent with it. The Florida courts have held that a witness can be compelled to testify under Sec. 914.04, notwithstanding the Fifth Amendment right against self-incrimination, because that testimony cannot be used against the witness. See, e.g., State v. Mitrani, 19 So. 3d 1065 (5th Dist. Ct. of App. 2009). Likewise, the US Supreme Court has repeatedly stated that immunity statutes may, consistent with the Fifth Amendment, compel witnesses to testify, provided that testimony is not used against them. See, e.g., United States v. Apfelbaum, 445 US 115, 125 (1980):
And this Court has repeatedly recognized the validity of immunity statutes. Kastigar v. United States, 406 U. S., at 449, acknowledged that Congress included immunity statutes in many of the regulatory measures adopted in the first half of this century, and that at the time of the enactment of 18 U. S. C. § 6002, the statute under which this prosecution was brought, there were in force over 50 federal immunity statutes as well as similar laws in every State of the Union. 406 U. S., at 447. This Court in Ullmann v. United States, supra, stated that such statutes have "become part of our constitutional fabric." 350 U. S., at 438. And the validity of such statutes may be traced in our decisions at least as far back as Brown v. Walker, supra.
As the Apfelbaum opinion notes, the Supreme Court upheld such a statute in 1896 in Brown v. Walker.
The bottom line is that if the state believes it will help its case, it may subpoena DA, WA, or HA to testify in CA's trial pursuant to Sec. 914.04, and if they refuse, they will be jailed for contempt. Whether that would be a wise strategy is a different question."