delivered the Opinion of the Court.
Defendant was convicted of driving under the influence of alcohol by the District Court, Eighteenth Judicial District, Gallatin County. We reverse and dismiss the judgment of the District Court.
At approximately 2:00 a.m., on March 23, 1985, Robert D. Peterson was arrested in Bozeman, Montana, for driving under the influence of alcohol. He made a motion to dismiss in Bozeman City Court on the grounds that the arresting officer refused to allow him to take a blood test. The City Court denied the motion and Peterson pled guilty on June 25, 1985. The same day, Peterson filed a notice of appeal to the District Court for a trial de novo. On September 6, 1985, Peterson again made a motion to dismiss on the grounds he had been denied due process of law by the officer’s refusal to allow him to take a blood test.
The motion was scheduled for hearing September 27, but the parties stipulated for a continuance until October 18, 1985. The hearing on the motion was held October 25 and taken under advisement by the District Court. No further action was taken until March 28, 1986, when the State of Montana filed a motion to set a trial date.
On April 11, 1986, the District Court denied Peterson’s motion to dismiss and set a trial date of May 30, 1986. On May 21, 1986, Peterson filed a second motion to dismiss on the grounds that he had been denied his constitutional right to a speedy trial. The District Court denied this motion and trial was held May 30. The court again took the matter under advisement until September 30, 1986, when the court found Peterson guilty of driving under the influence of alcohol. Peterson was sentenced to pay a fine of $300, to spend 24 hours in the Gallatin County Detention Center, to attend court school, and to have his driver’s license suspended for six months. Peterson now appeals this conviction, raising the following issues:
1. Whether a person suspected of driving under the influence of alcohol who refuses a breath test is entitled to an independent blood test at his or her own expense?
*420 2. Whether the District Court’s delay in considering the defendant’s motions denied him his constitutional right to a speedy trial?
The first issue has been decided by this Court in
State v. Swanson
(Mont. 1986), [
Generally, judicial decisions will apply retroactively.
Solem v. Stumes
(1984),
“1. Does the decision in question either establish a new principle of law by overruling established precedent on which the litigants relied or decide an issue of first impression whose resolution was not clearly foreshadowed?
“2. What are the merits of each case?
“A. What is the history, purpose and effect of the new principle of law?
“B. Whether retroactive application will further or retard the new principle’s operation?
“3. Whether substantial inequity will result from retroactive application?”
The first factor we consider is whether the
Swanson
rule overruled established precedent or decided an issue of first impression
*421
whose resolution was not clearly foreshadowed. In
Swanson,
this Court interpreted Section 61-8-405(2), MCA, as granting to the defendant the right to obtain an independent blood test to establish his or her sobriety regardless of whether the defendant submitted to a police designated test.
Swanson,
In denying defendant’s motion to dismiss for lack of due process, the District Court may have relied on
State v. Logan
(1985), [
The second factor we look to is the history, purpose and effect of the
Swanson
rule and whether retroactive application will further or retard its operation. In deciding
Swanson,
this Court relied on the Arizona Court of Appeals’ interpretation of a statute identical to Section 61-8-405(2), MCA, in
Smith v. Cada
(Ct.App. 1977),
We next consider whether retroactive application will further or retard operation of the
Swanson
rule. Retroactive effect should be given to new constitutional rules “whose major purpose is to overcome an aspect of the criminal trial that substantially impairs its truth-finding function and so raises serious questions about the accuracy of guilty verdicts in past trials.”
United States v. Johnson,
Finally, we examine whether substantial inequity will result from retroactively applying the
Swanson
rule. The State argues it would be inequitable to apply the rule retroactively since the law under
Logan
was relied upon by law enforcement officers and district court judges. However, no empirical evidence is given in support of this contention. The police in this case informed Peterson he had the right to consult an attorney and to have another blood test at his own expense, but they then prevented him from doing so by placing him in a holding cell for over ten hours. The District Court relied on
State v. Christopherson
(Mont. 1985), [
For the purpose of clarification of our rule in Swanson that one accused of a crime involving intoxication is entitled to obtain a *423 blood test, it should be explained that the rule applies only when (1) the defendant has timely claimed the right to a blood test, and (2) the officer or officers do not unreasonably impede the defendant’s right to obtain a blood test. If a blood test of the defendant is unavailable through no unreasonable acts of an officer or officers, the Swanson rule does not apply.
We therefore reverse the order of the District Court and order that the defendant’s motion to dismiss on the grounds of lack of due process be granted. For the foregoing reasons, we do not reach the second issue of speedy trial.
Notes
. The District Court in its order denying the motion cited
State v. Christopherson
(Mont. 1985), [
