Background
In 1992, Jermaine Foster and three codefendants committed a series of robberies to recoup a gambling debt, culminating in the abduction of four victims and Foster shooting three of them in a vacant field — killing two. A jury convicted Foster in 1994 of two counts of first-degree murder, one count of attempted first-degree murder, and four counts of kidnapping, and unanimously recommended death. The Florida Supreme Court affirmed on direct appeal in 1996. Central to the prosecution was testimony from codefendant Leondra Henderson, who stated that Foster had declared beforehand that he would kill the victims if they had no money — evidence that supported the cold, calculated, and premeditated aggravating factor.
Over the following decades, Foster pursued multiple rounds of postconviction relief. In 2018, he filed successive motions asserting Brady and Giglio violations predicated on his claim that Henderson’s trial testimony was coerced and false, and that the State knowingly presented or failed to correct that testimony. He alleged Henderson had privately recanted the statement about Foster’s premeditated intent to kill. An evidentiary hearing was held in December 2023, at which Foster presented fourteen witnesses; the State called none. In April 2024, the postconviction court entered an order denying all claims, finding Henderson’s testimony credible and concluding that Foster had not shown the State suppressed exculpatory evidence or knowingly introduced false testimony.
Foster also challenged the postconviction court’s exclusion of a polygraph report — administered to codefendant Gerard Booker — which Foster sought to admit to undermine Henderson’s credibility and to show the prosecutor’s knowledge of potential falsities in Henderson’s account. The court excluded the report but admitted a related letter from Booker’s attorney to the prosecutor describing the polygraph’s conclusions.
The Court’s Holding
The Florida Supreme Court affirmed the postconviction court’s denial of relief in all respects. On the Brady and Giglio claims, the Court applied a mixed standard of review — deferring to factual findings supported by competent, substantial evidence while reviewing legal conclusions de novo. The Court found that the record amply supported the postconviction court’s credibility determination that Henderson’s testimony was neither coerced nor false. Although witnesses testified that Henderson had privately told them his testimony was coerced, Henderson denied speaking to several of them, explained that he fabricated the recantation story to help Foster, and ultimately stood by his account of Foster’s stated intent. Prosecutor Jeffrey Ashton testified that the only pressure applied concerned Henderson’s own culpability, that no one told Henderson what to say, and that he would not have called Henderson if he believed the material testimony was untruthful.
Because Foster failed to establish the foundational falsity element of both his Brady and Giglio claims, the Court declined to reach his remaining arguments on those claims. On the polygraph issue, the Court characterized the challenge as a ruling on the admission of evidence reviewable for abuse of discretion. It held the postconviction court did not abuse its discretion by excluding the polygraph report, noting that polygraph evidence is generally inadmissible in Florida under well-established precedent. The Court further held that any error was harmless because the attorney’s letter — which had been admitted — conveyed the substance of what the polygraph report would have shown.
Key Takeaways
- A postconviction court’s credibility determinations on contested witness testimony are entitled to substantial deference and will not be disturbed on appeal when supported by competent, substantial evidence, even where testimony at the hearing was sharply conflicting.
- To prevail on a Brady claim, a defendant must show suppression, materiality, and prejudice; to prevail on a Giglio claim, a defendant must first establish that the testimony given was actually false — failure on that threshold element is fatal to both claims.
- Polygraph evidence remains generally inadmissible in Florida, and that rule applies in postconviction proceedings even when the evidence is offered not to prove guilt or innocence but to show a prosecutor’s knowledge; moreover, exclusion may be harmless where a separate admitted exhibit conveys the same information.
Why It Matters
This decision reinforces the high evidentiary bar death-row defendants face when attempting to unravel convictions through witness-recantation theories. The Court’s emphatic deference to the postconviction court’s credibility findings — even after a hearing in which the State presented no witnesses — underscores that Florida appellate courts will not reweigh conflicting testimony, and that a defendant’s characterization of a witness as “incredible” carries no legal force absent a showing that the finding was unsupported as a matter of law.
The ruling also clarifies the limits of the Brady framework as a vehicle for introducing otherwise-inadmissible evidence. Foster’s attempt to use the Brady/Giglio context to admit polygraph results was rejected: the Court held that inadmissible evidence does not become admissible merely because it is offered to show prosecutorial knowledge rather than substantive guilt, and that the general prohibition on polygraph evidence in Florida remains intact across procedural contexts.