Commonwealth v. Long, 69 N.E.3d 981

Defendant (Deryck Long) was convicted by a Superior Court jury of first‑degree murder for the January 9, 2006 shooting of Jamal Vaughn in Quincy; Brown was separately tried and acquitted.
Key prosecution witness Courtney Forde (cohort who drove and was present) testified under a plea agreement; his credibility was central to the Commonwealth’s case.
Defense had access to historical cell site location information (CSLI) for Forde’s phone showing movements between Quincy, Mattapan, and Dorchester during the evening, including gaps not described at trial.
A pretrial wiretap of jail visiting‑room phones was held unlawful by this court in Commonwealth v. Long (wiretap not authorized under G. L. c. 272, § 99); certain recordings and Gibbs’s testimony were suppressed.
The motion judge excluded Gibbs’s testimony as product of the illegal wiretap but denied suppression of Forde’s testimony, finding his decision to cooperate sufficiently attenuated from the illegal wiretap.
Defendant later moved for a new trial claiming (1) ineffective assistance because trial counsel declined to use CSLI to impeach Forde and failed to investigate its value, and (2) error in denying suppression of Forde’s testimony; both claims were denied and convictions affirmed.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Ineffective assistance — failure to introduce CSLI	CSLI would have impeached Forde’s timeline and undermined his credibility	Counsel unreasonably failed to present or fully investigate CSLI; decision not to use it was uninformed	Not ineffective: decision was strategic, not manifestly unreasonable; CSLI was double‑edged and counsel conducted thorough impeachment by other means
Ineffective assistance — failure to investigate CSLI	N/A (subsumed in claim above)	Counsel did not adequately investigate CSLI or consult the telecom expert whose testimony could explain CSLI	Not ineffective: judge credited counsel’s affidavit that he obtained records, weighed utility, and reasonably declined to call expert given trial developments
Suppression — admission of Forde’s testimony after illegal wiretap	Forde’s testimony flowed from the illegal wiretap (but‑for the wiretap, Forde would not have been arrested/coop) and should be suppressed	Forde’s decision to testify was voluntary and attenuated from the wiretap; police did not use wiretap to coerce him	Held: testimony admissible under attenuation doctrine — time lapse, intervening voluntary choice, and lack of purposeful/flagrant use weigh for attenuation

Commonwealth v. Long, 454 Mass. 542 (2009) (wiretap warrant ruled unauthorized under G. L. c. 272, § 99)
Strickland v. Washington, 466 U.S. 668 (1984) (framework for ineffective assistance — duty to investigate and strategic decision review)
Commonwealth v. Fredette, 396 Mass. 455 (1985) (attenuation doctrine factors: temporal lapse, intervening circumstances, purpose/flagrancy)
Commonwealth v. Damiano, 444 Mass. 444 (2005) (fruit‑of‑the‑poisonous‑tree suppression principles for illegally obtained evidence)
Wong Sun v. United States, 371 U.S. 471 (1963) (attenuation and ‘‘purged of primary taint’’ framework)
United States v. Ceccolini, 435 U.S. 268 (1978) (policy basis for attenuation doctrine and analysis of intervening free will)
Commonwealth v. Fielding, 371 Mass. 97 (1976) (short temporal gaps can still support attenuation when other factors present)
Commonwealth v. Caso, 377 Mass. 236 (1979) (witness’s voluntary decision to testify may constitute intervening circumstance sufficient for attenuation)
Commonwealth v. Estabrook, 472 Mass. 852 (2015) (no suppression where police did not confront witness with illegally obtained evidence to coerce testimony)