In November, 2008, as the scheduled release date for the sentence on the 2003 conviction approached, the district attorney filed a new petition again seeking the defendant’s commitment as a sexually dangerous person. Pursuant to G. L. c. 123A, § 13, in March, 2009, the defendant was examined by two qualified examiners, both of whom reported that he was not sexually dangerous.
The defendant correctly argues that the dismissal of the 2009 petition renders this appeal moot. It is academic whether the judge in this case, in 2006, was correct in ruling as he did. The fact is that in 2009 the Commonwealth was unable to sustain its burden of proving sexual dangerousness. The focus of a sexually dangerous person proceeding — whether it is based on the Commonwealth’s petition to commit an individual pursuant to G. L. c. 123A, § 12, or on an individual’s petition for discharge under G. L. c. 123A, § 9 •— is the person’s present condition. See Dutil, petitioner, 437 Mass. 9, 16 (2002), and cases cited. If a defendant’s condition in 2009 is not sexually dangerous, as reported by both qualified examiners, and the Commonwealth is unable as a matter of law to satisfy its burden of proving otherwise, the defendant cannot be (or, in the case of a discharge proceeding, cannot remain) committed. It matters not whether he was sexually dangerous in 2006.
We decline the Commonwealth’s invitation to decide the appeal notwithstanding its mootness. The issue is capable of repetition, as the Commonwealth claims, but it will not necessarily evade appellate review. The better course is to decide the issue, which is significant and has constitutional implications, in a live controversy. See Lockhart v. Attorney Gen., 390 Mass. 780, 783-784 (1984) (“Where a moot issue ... is not apt to evade review ... we have declined to decide the issue”; also noting general “practice ... of not unnecessarily deciding constitutional questions”).
2. In dismissing the appeal as moot, we reserve judgment on the question whether G. L. c. 123A, properly construed, permits a finding of sexual dangerousness based on an individual’s history of committing noncontact
3. For these reasons, the Commonwealth’s appeal from the Superior Court’s October, 2006, amended judgment and order of discharge is dismissed as moot.
So ordered.
The reports of the qualified examiners were filed after the decision of the Appeals Court in the case at bar and after we had granted the application for further appellate review.
Our decision in Johnstone, petitioner, 453 Mass. 544, 545, 553 (2009), made clear that the holding applies equally to proceedings under G. L. c. 123A, § 9, and G. L. c. 123A, § 12.
