Mоnte Cox appeals from an order denying his petition for a writ of certiorari seeking review of the Department of Health and Social Services’ decision revoking his probation. 1 Hе claims that the Department did not have jurisdiction to revoke his probation and that the evidence for revocation was insufficient. Because we conclude that the Department had jurisdiction to revoke Cox’s probation and that there was sufficient evidence presented at the revocation hearing to support the revocation, we affirm.
On May 3, 1979, Cox was сonvicted of intentionally delivering a controlled substance and sentenced to an indeterminate term of imprisonment not to exceed two *380 years. The court stayed Cox’s sentencе and placed him on probation for one year with the condition that he refrain from the use of or contact with drugs. On April 29, 1980, the Department issued a probation violation warrant alleging that Cox had participated in the possession, use, distribution, and sale of illegal drugs, contrary to the conditions of his probation. 2 Cox was taken into custody on May 2, 1980, and, after a final revocation hearing held a few weeks later, the Department ordered that his probation be revoked.
Our review of the Department’s revocation decision is limited to whether the Department kept within its jurisdiction and acted according to law; whether its action was arbitrary, oppressive, or unreasonable and represented its will and not its judgment; and whether the evidence was such that the Department might reasonably make the order or determination in question.
State ex rd. Foshey v. Wisconsin Department of Health & Social Services,
JURISDICTIONAL ISSUES
We conclude that the issuance of a warrant during the probationary term tolls the running of the term.
3
This conclusiоn is consistent with federal cases that hold that warrants issued during probation periods preserve revocation jurisdiction even if they are not actually executed until after the expiration of such periods.
See United
*381
States v. Cox,
We also conclude that the warrant was nоt defective even though it was issued without a written request. Cox cites no authority holding that probation violation warrants are invalid if they are not based on a written request. The cases that havе addressed this issue instead hold that administrative warrants, unlike judicial warrants, need not be supported by affidavits establishing probable cause.
See United States ex rel. Randazzo v. Follette,
*382
In response to Cox’s final jurisdictional argument, wе conclude that the revocation proceedings were not defective because they were instituted prior to the filing of criminal charges for the same incidents upon which revocation proceedings were based. As recognized in
Flowers,
probation may be revoked for conduct that in itself does not violate the criminal law.
Flowers,
EVIDENTIARY ISSUES
During the final revocation hearing, Cox’s probation agent, Sonja Bjork, testified as to the procedures she followed in initiating revocation proceedings. Bjork also called and examined witnesses to Cox’s rule violations. Cox contends that because Bjork assumed the role of a witness and an advocate, her testimony should be accorded little wеight. Cox also contends that the witnesses to the rule violations were, as a matter of law, incompetent to testify, and that their testimony, when considered along with Bjork’s, provided no basis upon which the Department could reach a reasoned decision.
In considering whether there was sufficient evidence for the Department’s decision, this court is not empowered to weigh thе evidence and conduct a
de novo
review. Instead, we are limited to ascertaining whether substantial evidence exists in support of the Department’s decision. So long as the Department аcts upon a rational basis and the action represents its judgment and not its will, the agency’s decision must be upheld.
Van Ermen
*383
v. Department of Health & Social Services,
We conclude that there is substantial evidence in the record to suppоrt the Department’s decision. Bjork’s testimony consisted only of a summary of the procedures she followed in instituting revocation proceedings. Her testimony had no relevance to the issuе to be decided at the hearing; that is, whether Cox violated the rules of his probation. Because Bjork’s testimony was irrelevant to that issue, it may be fairly assumed that the Department relied on the testimony of other witnesses in reaching its decision. 4
Cox next argues that the witnesses against him were incompetent to testify because they admitted to having one “hit” of marijuana approximately three hours before the revocation hearing. Cox also argues that the witnesses were incompetent because they had been promised immunity from prosecution and had received money for the expenses they incurred while participating in the Marshfield Police Department’s investigation of Cox’s involvement with drugs.
We conclude that the witnesses were compеtent to testify and that the Department could properly rely on their testimony. In addressing the issue of their competency as it relates to their usage of marijuana, the hearing examiner wаs in a better position than this court to assess the competency of witnesses. The hearing examiner’s decision should therefore not be reversed unless it is “clearly and manifestly wrong.”
See State
*384
v. Schweider,
In
Schweider,
the court stated that competency has two aspects: “(1) The mental capacity to understand the nature of the questions and to form and communicate intelligent answers thereto; (2) the morаl responsibility to speak the truth, which is the essence and obligation of an oath.”
Id.
Cox points to no discrepancies in the witnesses’ testimony that reflect their inability to meet the two requirements of competency set forth in
Schweider.
Our review of their testimony indicates that they were able to understand and respond to the questions asked of them and that they recognized their duty to speak the truth. Their admitted use of marijuana therefore goes only to their credibility, which was a matter for the hearing examiner to consider.
See United States v. Harris,
We also find no support for Cox’s argument that the witnesses’ grant of immunity and receipt of money for expenses related to the police department’s investigation rendered them incompetent to testify. These factors concern the witnesses’ credibility, not competency.
See State ex rel. Kowaleski v. Kubiak,
By the Court. — Order affirmed.
Notes
The appropriate procedure in this case would have been to issue a writ of certiorari and following review to deny relief by a final judgment. It does not appear from the record on appeal that a writ was issued. The circuit court order was, however, purportedly entered following a review of the record and a consideration of the merits of Cox’s claimed bases for relief. The order does not give any explanation for denying the writ or other relief, and the order was not accompanied by a memorandum decision. To give Cox a review, we construe the order as a final, appealable judgment.
See Fredrick v. City of Janesville,
The warrant is not in the record forwarded to this court. These facts are taken from the transcript of the revocation hearing held June 19, 1980.
Because of this cоnclusion, we do not have to determine whether Cox’s probation ended on May 1, 1980, or, as the Department argues, May 2, 1980. We also do not decide whether Cox’s probation was tolled from the date Cox violated the terms of his probation.
In addition to other deficiencies in the record, we have also not been favored with any written or oral decision of the Departmеnt, and, consequently, we do not know the actual basis for the revocation decision. The appeal record is the appellant’s responsibility.
Because we deny reliei basеd on our independent review of the materials presented to us on appeal, we need not consider whether the trial court lacked jurisdiction over the Department because it was not properly served, or whether the Department has waived its right to object to Cox’s failure to serve them with a writ or the petition. We also do not decide whether this appeal is moot because Cox has reached his mandatory release date on the sentence for which probation was revoked.
