Commonwealth v. Walker

After a jury-waived trial, a judge of the Superior Court found the defendant to be a sexually dangerous person, as defined in G. L. c. 123A, § 1,1 and committed him pursuant to § 14(d) thereof. On appeal, the defendant challenges (1) the sufficiency of the evidence supporting the judge’s conclusion that the defendant represents a menace to the health and safety of others, and (2) the propriety of certain testimony of the Commonwealth’s expert witness.

The thrust of the defendant’s appeal concerns the nature of the defendant’s predicted sexual offenses together with any resulting harm.2 The…