[¶ 1] Michael Brewer appeals from the judgment entered in the Superior Court (Lincoln County, Marsano, J.) dismissing Brewer’s legal malpractice complaint against Dennis Hagemann. Brewer alleges that Hagemann’s representation of Brewer in a criminal case was negligent and caused Brewer’s conviction and incarceration. The Superior Court held that Brewer could not show7 that his damages were proximately caused by Hagemann’s negligence because his conviction had not been vacated. We affirm the dismissal of the complaint.
[¶ 2] Brewer was convicted after a jury trial of three serious criminal offenses. He filed a late appeal which was dismissed for untimeliness.
State v. Brewer,
[¶ 3] While the post-conviction matter was pending, Brewer filed the instant malpractice complaint against Hagemann. The case was stayed for several years, apparently while the post-conviction matter and the appeal were proceeding through the courts. After the stay order was lifted, Hagemann moved to dismiss, primarily arguing that Brewer was required to prove his innocence of the criminal charges. Hagemann contends that an element of a malpractice claim arising from representation in a criminal defense is the innocence of the malpractice plaintiff. He also argues that Brewer is unable, as a matter of law, to show proximate cause. Hagemann argued in the Superior Court that Brewer was barred by res judi-cata or collateral estoppel from recovering damages against Hagemann.
[¶ 4] A motion to dismiss pursuant to M.R. Civ. P. 12(b)(6) tests the sufficiency of the complaint.
Potter, Prescott, Jamieson & Nelson, P.A. v. Campbell,
[¶ 5] We have not yet had occasion to determine whether legal malpractice based on negligent representation in a criminal case should be treated differently from legal malpractice arising from repre
*1032
sentation in a civil matter. The elements
of
civil legal malpractice are (1) breach of a duty by a defendant to conform to a certain standard of conduct, and (2) the plaintiffs damages were proximately caused by the defendant’s breach.
Niehoff v. Shankman & Assoc. Legal Center,
[¶ 6] Courts across the country have not uniformly addressed whether the elements of criminal legal malpractice differ from the elements of civil legal malpractice. Some courts have required criminal malpractice plaintiffs to prove actual innocence of the criminal charge, 3 while other courts have required that the conviction be overturned, or that the malpractice plaintiff be exonerated of the criminal charge. 4 A minority of courts have reject *1033 ed the addition of the element of innocence or exoneration to a malpractice action and have held that a criminal malpractice plaintiff must prove the same elements as a civil malpractice plaintiff. 5
[¶ 7] The situation presented by this ease does not require us to consider departing from the standard elements that every legal malpractice plaintiff must prove. As stated above, one of those elements is causation; that is, proof that the plaintiffs damages were proximately caused by the defendant attorney’s negligence. The injuries of which Brewer complains all arose from his conviction and incarceration. His complaint pins all of his damages, such as loss of wages, emotional distress, and additional attorney fees, on the fact that he wras convicted of the charges for which he was tried. The issue of proximate causation, however, has already been decided against Brewer. The Superior Court, in Brewer’s post-conviction proceeding, decided that Hagemann’s negligence did not cause Brewer’s conviction, and we affirmed that determination.
Brewer,
[¶8] Brewer cannot attack that determination in this case. Brewer is collaterally estopped from relitigating the issue of causation. Collateral estoppel prohibits parties who have litigated an issue from relitigating it in another action.
Cline v. Maine Coast Nordic,
[¶ 9] Brewer had every incentive to prove in the post-conviction hearing that Hagemann’s ineffective representation of him was prejudicial because without proving prejudice Brewer could not succeed on the post-conviction petition. The United States Supreme Court held in
Strickland v. Washington,
[¶ 10] In his post-conviction case, Brewer was not able to demonstrate a reasonable probability that the outcome in his *1034 criminal case would have been different but for his attorney’s negligence. Since he could not meet the Strickland prejudice prong, he cannot meet the legal malpractice element of proving proximate cause by a preponderance of the evidence. Because the decision in his post-conviction case bars him, as a matter of law, from demonstrating proximate cause, an essential element of the tort of professional malpractice, the Superior Court was correct in dismissing his complaint.
The entry is:
Judgment affirmed.
Notes
. Following the trial, Hagemann, who was Brewer's trial counsel, was allowed to withdraw, and the court appointed another attorney to represent Brewer at sentencing.
State v. Brewer,
. The post-conviction petition also alleged that Brewer's second counsel was inadequate because he had neglected to file a timely appeal. The Superior Court granted that portion of the petition regarding the failure of the second attorney to file an appeal and reinstated Brewer's right to appeal his conviction.
Brewer,
. Several courts have determined that a malpractice plaintiff must prove the plaintiff's innocence of the criminal charge for which he or she was convicted. The California Supreme Court articulated the policy reasons for this position and held "that in a criminal malpractice action actual innocence is a necessary element of the plaintiff's cause of action.”
Wiley v. County of San Diego,
. Jurisdictions which require the malpractice plaintiff to prove exoneration instead of requiring the malpractice plaintiff to prove innocence include Texas.
See Peeler v. Hughes & Luce,
A variation is demonstrated by
Shaw v. State,
.
See, e.g., Krahn v. Kinney,
