Travolta filed a complaint of attempted extortion, but authorities did not reveal details of the allegations.
The plot was related to the circumstances surrounding Jett Travolta's death and photos weren't involved, TMZ reported Saturday.
Former Sen. Pleasant Bridgewater resigned Saturday, saying she is innocent but needs to fight what she calls "untrue and unfair charges."
Police arrested her Thursday on charges of abetment to extort and conspiracy to extort. She was released Friday on $40,000 bail.
Bridgewater on Saturday called the ordeal a "nightmare" and said her "innocent actions" as an attorney were misconstrued. She did not provide details.
Police also detained an ambulance driver, Tarino Lightbourne, and a former tourism minister and friend of the Travoltas, Obie Wilchcombe, who has since been released.
Several tabloids quoted Lightbourne describing efforts to revive the celebrity's chronically ill son Jett, who died of a seizure this month at their family vacation home on Grand Bahama.
The actor and his wife Kelly Preston returned home to Florida with the ashes of their 16-year-old son. Travolta's publicist Paul Bloch said Friday that Travolta has no comment.
The Associated Press contributed to this report.