United States v. John Tomkins, 782 F.3d 338

Tomkins sent threats to investment firms and employees, including letters and packages with homemade pipe bombs.
Packages warned victims they were alive only because one wire was unattached; devices contained gunpowder, lead pellets, and igniters.
Two devices were mailed in 2007; one to Kansas City and one to Chicago; Chicago device analyzed after being opened.
Investigation linked Tomkins to stock manipulation and union treasury records; warrants for home and storage lockers yielded additional bombs and documents.
Trial featured extensive testimony on device design; government showed the devices had explosive components, while Tomkins claimed hoax/no explosion intent.
District court allowed an x-ray as rebuttal evidence after initial exclusion and later admitted it; Tomkins argued Brady and Rule 16 violations.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Subjective intent evidence	Tomkins argues Johnson barred hoax-intent evidence but was applied too broadly.	Tomkins contends his hoax defense was improperly excluded, violating due process.	No reversible error; Johnson controls; harmless overall.
X-ray under Rule 16	Rule 16 violation due to late x-ray production; merits mistrial.	Rule 16 remedy admissible; x-ray rebuttal appropriate and non-prejudicial.	Admission as rebuttal harmless; no mistrial required.
Destructive-device jury instruction	Johnson requires subjective-intent analysis; jury should not be instructed as if device is a weapon as a matter of law.	Instructions correctly treated device as a destructive device under Johnson.	Harmless error; evidence showed destructive-device characteristics beyond reasonable doubt.
Search warrants and good-faith	Warrants lacked temporal constraints and scope; suppression warranted.	Good-faith exception applies; omissions did not undermine probable cause.	Good-faith reliance; suppression not warranted.
Alleyne implications	Periodic enhancement of minimum sentences must be submitted to jury.	Statutes here do not require a separate finding beyond implied conclusions from instructions.	No Alleyne error; jury inviolate in determining destructive-device status under instructions.

United States v. Johnson, 152 F.3d 618 (7th Cir. 1998) (destructive-device analysis—subjective intent limited when device design shows weapon-only purpose)
United States v. Fleischli, 305 F.3d 643 (7th Cir. 2002) (fireworks defense distinguished but allowed limited alternative theories)
United States v. Saunders, 166 F.3d 907 (7th Cir. 1999) (components indicating destructive-use may foreclose subjective-intent defenses)
United States v. Urban, 140 F.3d 229 (3d Cir. 1998) (intent irrelevant when objective design shows destructive device)
United States v. Posnjak, 457 F.2d 1110 (2d Cir. 1972) (destructive-device analysis—design and parts considered)
United States v. Lussier, 128 F.3d 1312 (9th Cir. 1997) (no auxiliary evidence required when device clearly weapon-like)
United States v. Copus, 93 F.3d 269 (7th Cir. 1996) (destructive-device conviction upheld with combined parts evidence)
Apprendi v. New Jersey, 530 U.S. 466 (U.S. 2000) (state-of-mind facts as elements of punishment considerations)
Glebe v. Frost, 135 S. Ct. 429 (2014) (harmless-error standard limited to fundamental trial errors)