OPINION
Michael Neel Gleason appeals from the dismissal by the trial court of both his application for a temporary injunction and his action for damages against an opposing attorney in the context of a divorce proceeding. Gleason brings seven points of error. We affirm in part and reverse and remand in part.
The facts in this case are as follows. Joan Louise Gleason (co-appellee) and Michael Neel Gleason (appellant) were married in 1963. In 1973 Joan Gleason filed suit for divorce (cause No. 936005). The action raised issues of child custody, child support, property division and temporary injunction against the husband. Appellant retained J. Michael Coman (co-appellee) as counsel by written contract. Michael Co-man represented appellant from March 15, 1973 until September 12,1973. The divorce action ended in reconciliation.
In March, 1979 a second divorce action was filed. A decree of divorce was entered February 5, 1980. Subsequent disputes arose on several issues, including child custody, child support, property division and injunction. In February, 1983, Joan Gleason retained J. Michael Coman as counsel in these matters (cause No. 79-10557-AC). All these actions concern the same marriage. Appellant’s motion to disqualify Co-man as attorney for appellee was dismissed. His appeal from this interlocutory action was dismissed by this court for lack of jurisdiction in Cause No. C14-84-224CV, dated April 12, 1984. Appellant then filed a separate action for a temporary injunction and damages against appellees in the trial court, and paid jury fees. (Cause No. 79-10557-B). At a non-jury hearing on the *566 temporary injunction appellant’s suit was dismissed.
Point of error one attempts to re-argue the appeal of the motion to disqualify Coman. We have no statutory authority to review the trial court’s interlocutory order overruling appellant’s motion. In the absence of statutory authority, this court has no jurisdiction of the appeal.
Knox v. Long,
Appellant’s point of error two raises the issue of whether the refusal to enjoin the attorney was reversible error. To decide the issue we must first decide whether an injunction is an appropriate remedy where the trial judge abuses its discretion in refusing to disqualify an attorney for violations of the Texas Code of Professional Responsibility. We recognize that one Texas court has intimated, and another has held, that injunctive relief is available to disqualify opposing counsel in cases involving possible conflicts of interest.
See Braun v. Valley Ear, Nose & Throat Specialists,
As set forth by this court in
Houck v. Kroger Co.,
We think that appellant has met his burden of showing a “probable right” in this case. The attempt by the attorney to represent the wife in this case constitutes professional misconduct in violation of DR 4-101(B) of the Texas Code of Professional Responsibility, which states that a lawyer shall not knowingly reveal a confidence or secret of his client or use a confidence or secret of his client to the client’s disadvantage. SUPREME COURT OF TEXAS, RULES GOVERNING THE STATE BAR OF TEXAS art. XII, § 8 DR 4-101(B) (1973). An attorney’s duty to preserve his client’s confidence outlasts his employment. Thus a clear conflict of interest exists.
See
State Bar of Texas, Comm, on Interpretation of the Canons of Ethics, Op. 294 (1965). The representation also violates Canon 9 of the Code, which states that an attorney shall avoid even the appearance of impropriety.
See
RULES GOVERNING THE STATE BAR OF TEXAS Canon 9, EC 9-1 to EC 9-6 & DR 9-101 to DR 9-102; Note,
Motions to Disqualify Counsel Representing an Interest Adverse to a Former Client,
57 TEXAS L.REV. 726, 728 (1979);
Cf. Braun v. Valley Ear, Nose & Throat Specialists,
The rule under the “substantially related” test that is an attorney will be disqualified if a substantial relationship can be shown between the subject matter of a former representation by the attorney and a subsequent adverse representation.
Howard Hughes Medical Institute v. Lummis,
We think, however, that appellant has not met the second requirement for an injunction, that of “probable injury” or “inadequate remedy at law.” Where appeal is an inadequate remedy, an adequate remedy for clear abuses of discretion by the court already exists by way of mandamus. Injury can thus be prevented by appellant himself.
Maresca v. Marks,
Point of error three raises the question of whether it is error for the trial court to inquire into actual confidences exchanged between the client and attorney. The Fifth Circuit has adopted a presumption in adverse representation cases that confidences were exchanged between the attorney and the former client.
Kraft Inc. v. Alton Box Board,
Points of error four through seven address the dismissal of appellant’s action for damages against the attorney at the injunction hearing. We sustain these points of error for two reasons. First, it is well established in Texas Courts that dismissal of a case is not proper on the court’s own motion. Here the trial judge dismissed appellant’s case sua sponte, without a plea in abatement or special exceptions by the defendant. To do so is error.
See Herring v. Texas Department of Corrections,
The part of the judgment of the trial court denying the application for a temporary injunction is affirmed; that part dismissing the remainder of the appellant’s action is reversed and remanded for further proceedings consistent with this opinion. Points of error one and two are overruled, all others are sustained.
