Robert K. Kraft, the owner of the New England Patriots, has asked the prosecutor who charged him with solicitation of prostitution to turn over “evidence materially favorable” to his case.

The request, made by Mr. Kraft’s lawyers, is the latest salvo in a high-profile fight over two misdemeanors that allege that Mr. Kraft paid for sex in late January at a massage parlor in Jupiter, Fla. While he does not deny being at the massage parlor, Mr. Kraft insists that he did nothing illegal, and that much of the evidence being used against him was improperly obtained by the police.

Mr. Kraft has not accepted a plea deal from the Palm Beach County state attorney, Dave Aronberg, because it would have obligated him to admit that prosecutors would win the case if it went to trial. Since then, his legal team has filed a number of motions to keep private and suppress evidence in the case, including surveillance video of Mr. Kraft inside the massage parlor. Mr. Kraft’s lawyers contend that the police knew that no human trafficking occurred inside the massage parlor, yet told a judge that it was in fact going on as a way to obtain a search warrant and install cameras inside the building.

In a letter sent to Mr. Aronberg on Wednesday, Mr. Kraft’s lawyers asked for information on all people who were secretly recorded inside the massage parlor but who were not charged with a crime. The lawyers also want “all information casting doubt on any claim that those working at the Spa were involved in or victims of human trafficking.”