487 Mass. 314
Mass.2021Background
- Victim found dead in his Attleboro apartment on July 10, 2011; injured by blunt force, strangulation, and stab wounds; fire in bedroom extinguished by sprinklers.
- Defendant (Gumkowski) knew victim and admitted being in the apartment that evening; recorded police interview and girlfriend testimony placed him in Attleboro around the time of the killing.
- Police obtained the victim's call logs from Sprint and, via the subscriber number that linked to the defendant, received the defendant's call detail records that included cell site location information (CSLI); investigators used call records and traditional detective work to identify and arrest the defendant at his girlfriend’s mother’s house on July 12.
- After arrest, blood matching the victim’s DNA was found on the defendant’s shoe and on items in his backpack; defendant testified at trial and provided a differing account.
- Defendant moved to suppress CSLI and derived evidence; trial court denied suppression; after a mistrial, defendant was convicted at a second trial of first‑degree murder (extreme atrocity or cruelty). On appeal, he challenged CSLI admission, the suppression fruits, and several jury instructions.
Issues
| Issue | Commonwealth's Argument | Gumkowski's Argument | Held |
|---|---|---|---|
| Whether a warrant was required for defendant's CSLI and whether obtaining it was State action | CSLI was provided voluntarily under the Stored Communications Act (SCA) §2702(c) so no warrant issue | CSLI is subject to warrant protection; police instigated the records request so State action occurred and warrant was required | Warrant required; law enforcement instigated the search by requesting records, so CSLI should have been suppressed |
| Whether admission of CSLI was harmless error | CSLI corroborated other evidence and was cumulative; any error harmless beyond a reasonable doubt | Admission of CSLI was prejudicial and required suppression of any taint | Admission of CSLI was harmless beyond a reasonable doubt given corroboration, limited use, and strong other evidence |
| Whether call logs, arrest, and physical evidence were fruits of unlawfully obtained CSLI | Call logs and arrest resulted from independent sources (call logs/subscriber info and traditional techniques), not derived from CSLI | CSLI tainted the investigation; fruits (call logs, arrest, seized items) should be suppressed as poisoned tree | Call logs and arrest/physical evidence were not fruits of the CSLI; they derived from independent investigative steps and thus need not be suppressed |
| Whether multiple jury instructions (and counsel’s failure to object) created a substantial likelihood of miscarriage of justice | Instructions, read as a whole, were adequate and any errors were harmless | Several instructions were erroneous or ill‑advised and counsel’s failure to object was ineffective, warranting relief | Some isolated instructions (notably the circumstantial‑evidence hypothetical that closely paralleled the case) were ill‑advised and counsel’s failure to object was error, but no substantial likelihood of a miscarriage of justice; conviction affirmed |
Key Cases Cited
- Commonwealth v. Augustine, 467 Mass. 230 (Mass. 2014) (CSLI generally requires a warrant)
- Carpenter v. United States, 138 S. Ct. 2206 (U.S. 2018) (warrant requirement for historical CSLI under Fourth Amendment)
- Commonwealth v. Brandwein, 435 Mass. 623 (Mass. 2002) (State action required for Fourth Amendment constraints on private searches)
- Commonwealth v. Tavares, 482 Mass. 694 (Mass. 2019) (standard for harmless error review of suppressed‑evidence admissions)
- Commonwealth v. Vazquez, 478 Mass. 443 (Mass. 2017) (CSLI as corroborative evidence)
- Commonwealth v. Jones‑Pannell, 472 Mass. 429 (Mass. 2015) (appellate review accepts suppression hearing judge’s factual findings)
- Commonwealth v. Estabrook, 472 Mass. 852 (Mass. 2015) (definition and treatment of CSLI)
- Wong Sun v. United States, 371 U.S. 471 (U.S. 1963) (fruit of the poisonous tree doctrine)
- Commonwealth v. Silva, 482 Mass. 275 (Mass. 2019) (caution about hypotheticals in circumstantial‑evidence instructions)