As per my previous question How do Florida's labor laws protect employees injured when asked to do something unreasonable?
A girl working in Florida insisted on filing an injury report after being asked not to. She was then, after working there 6+ months with zero write-ups, given three write ups within a span of hours for frivolous violations, including her shirt coming un-tucked while reaching upward for something, and mentioning the incident to a co-worker (who then went tell management she needs a doctor), which the management labeled as talking about non-work-related topics, and the third was so frivolous she's not even clear what it was for. She's on track to be fired on her next shift.
What would it take to prove motive in such a case in order to make a case that the company is breaking Florida Statute 440.205?
Coercion of employees.—No employer shall discharge, threaten to discharge, intimidate, or coerce any employee by reason of such employee’s valid claim for compensation or attempt to claim compensation under the Workers’ Compensation Law.
More specifically (for the scope of this site), what are the primary fundamental questions that would have to be answered "yes" to make such a case?