Defendants were subpoenaed in 1973 to appear before a Wayne County Citizens’ Grand Jury and testify as to the solicitation of personal injury claims in connection with a particular law firm. Despite a grant of immunity, defendants refused to testify. They were then adjudged in contempt and sentenced to one year imprisonment. Defendants were later called again before the same grand jury and, after a refusal to testify, were convicted of contempt and sentenced to a second one-year imprisonment term. The second sentence was discharged in People v Walker, 393 Mich 333; 224 NW2d 879 (1975), as defendants had already served the statutory maximum one *404year in prison for contempts before a grand jury. See MCLA 767.19c; MSA 28.959(3). Subsequently, a new grand jury was empaneled to investigate automobile insurance fraud. Defendants were summoned before this grand jury. Again, despite a grant of immunity, defendants refused to testify, whereupon they were fined $10,000 and sentenced to prison until the expiration of the grand jury’s term1 or until they purged themselves of the contempt by testifying.2
Defendants claim that the second grand jury asked the "same or similar” questions as the first grand jury and that therefore the total punishment cannot exceed the statutory maximum. In other words, defendants contend that the sentence for contempt for refusing to testify in response to the same or similar questions can never exceed one year and/or $10,000, even if the questions are propounded by different grand juries.
MCLA 767.19c; MSA 28.959(3) provides a maximum penalty for refusal to answer questions "before the grand jury concerning any matter or thing of which the witness has knowledge concerning matters before the grand jury”. That both grand juries were investigating substantially the same subject matter can be inferred from defendants’ grants of immunity. The prosecutor’s petition in support of the original grant of immunity states:
"The prosecuting attorney has reason to believe that said witness has knowledge of a matter before the grand jury, to wit: The solicitation by the witness, *405James Walker, Jr., of numerous personal injury claims for the law firm of Barbara and Wisok; the setting up of various fraudulent accidents and the attempts to obtain money in connection with these accidents and the complete operation of the J & W investigative firm and its associations with the law firm of Barbara and Wisok.”
The petition in support of the second grant of immunity states:
"The prosecuting attorney has reason to believe that said witness has knowledge of a matter before the Wayne County Citizens Grand Jury, to wit: The operation and maintenance of 'J & W Investigations’ along with the purported and actual purposes of said business; any arrangement between the witness and any other person for the purpose of furthering any form of tax fraud, possible obstruction of justice either by the witness in connection with other witnesses in pending criminal cases or by other persons in connection with the witness; possible perjury and/or subornation thereof by the witness or other persons; the solicitation of personal injury claims by the witness or other persons on behalf of the former lav/ firm of Barbara and Wisok P. C.; the knowing solicitation of false accident claims by the witness or by others on behalf of the abovementioned law firm for the purpose of obtaining money under false pretenses.”
Thus, we must decide whether MCLA 767.19c; MSA 28.959(3) applies to refusals to answer before different grand juries investigating the same subject matter.
This issue is one of first impression in Michigan. People v Walker, supra, at 340, n 3, expressly left open the question of whether punishment for contempt before different grand juries can exceed the statutory maximum.
The statutory language, while not dispositive, is helpful. MCLA 767.19c; MSA 28.959(3) provides a *406maximum penalty for the refusal of a witness "to appear or testify * * * before the grand jury * * * concerning matters before the grand jury”. (Emphasis added.) The focus on one particular grand jury indicates an intent not to apply the maximum penalty to different grand juries.
This interpretation is consistent with the rationale of People v Walker, supra, which was that allowing separate sentences up to the statutory maximum for each refusal to testify before the same grand jury could potentially be abused so as to render the maximum penalty virtually infinite. On the other hand, interpreting the statute to allow up to the maximum punishment for con-tempts before each grand jury presents less of a potential for abuse.3
In addition, a new grand jury must start with a clean slate; testimony presented before one grand jury generally cannot be made known to a second grand jury. See MCLA 767.19f; MSA 28.959(6). It would hinder the lawful investigative functions of subsequent grand juries if witnesses’ testimony could not be coerced because they already had been sentenced to the statutory maximum penalty by a prior grand jury. See People v Walker, supra, at 340.
Thus, the statutory maximum penalty does not *407apply to separate refusals to testify before different grand juries.
Affirmed.
C. W. Simon, Jr., J., concurred.The second grand jury’s term expired on May 6, 1976.
This was clearly civil contempt. The sole purpose of the sanction was to compel the witnesses to testify, not to punish them for refusing to testify. See Spalter v Wayne Circuit Judge, 35 Mich App 156, 160-161; 192 NW2d 347, 349 (1971).
At the least, defendants cannot be imprisoned for civil contempt beyond the life of the grand jury. Shillitani v United States, 384 US 364; 86 S Ct 1531; 16 L Ed 2d 622 (1966), Spalter v Wayne Circuit Judge, 35 Mich App 156; 192 NW2d 347 (1971). In addition, a grand jury investigation is not proper if there is no possible punishable crime to investigate, e.g., if the statute of limitations had run on all possible crimes. See People v Curtis, 36 Cal App 2d 306; 98 P2d 228 (1939).
We agree with Judge Burns that repeated contempt sentences may at some point become unduly oppressive. When such abuse of the grand jury process occurs, we should act to protect the due process rights of witnesses. But this issue is not before us in the instant case.