My guess is that the vast majority of texts were of the form "OMG this class is so boring" and "R U here yet" from three months ago and the like, and probably can't possibly pertain to the trial. On the other hand there may be some that are not exculpatory on the basis of these statutes:
26-1-812. Advocate privilege. (1) Unless a report is otherwise required by law, an advocate may not, without consent of the victim, be examined as to any communication made to the advocate by a victim and may not divulge records kept during the course of providing shelter, counseling, or crisis intervention services.
(2) This privilege belongs to the victim and may not be waived, except by express consent. The privilege continues even if the victim is unreachable. Consent may not be implied because the victim is a party to a divorce or custody proceeding. The privilege terminates upon the death of the victim.
(3) For purposes of this section, the following definitions apply:
(a) "Advocate" means an employee or volunteer of a domestic violence shelter, crisis line, or victim's services provider that provides services for victims of sexual assault, stalking, or any assault on a partner or family member.
(b) "Victim" means a person seeking assistance because of partner or family member assault, any sexual assault, or stalking, whether or not the victim seeks or receives services within the criminal justice system.
And some may fall under the auspices of the rape shield which basically says that the prosecution cannot use the "but she is a slut" defense:
45-5-511. Provisions generally applicable to sexual crimes. (1) When criminality depends on the victim being less than 16 years old, it is a defense for the offender to prove that the offender reasonably believed the child to be above that age. The belief may not be considered reasonable if the child is less than 14 years old.
(2) Evidence concerning the sexual conduct of the victim is inadmissible in prosecutions under this part except evidence of the victim's past sexual conduct with the offender or evidence of specific instances of the victim's sexual activity to show the origin of semen, pregnancy, or disease that is at issue in the prosecution.
(3) If the defendant proposes for any purpose to offer evidence described in subsection (2), the trial judge shall order a hearing out of the presence of the jury to determine whether the proposed evidence is admissible under subsection (2).
(4) Evidence of failure to make a timely complaint or immediate outcry does not raise any presumption as to the credibility of the victim.
(5) Resistance by the victim is not required to show lack of consent. Force, fear, or threat is sufficient alone to show lack of consent.
At any rate, the prosecutor and the judges are all public servants, and at some point we just have to trust them to make the right call. If there is in fact a conspiracy orchestrated by Pat Williams to use his powers over all levels of police, campus police, Royce Engstrom, the board of regents, all city and county offices in Missoula, as well as his considerable sway over all of the judges in the state, then there is nothing we can do but hope to hell that Pat Williams can take over QB duties next fall against App St.