Luke Matthew Sweetser v. the State of Texas, 08-22-00192-CR

Defendant Luke Sweetser was convicted of murder for the December 12, 2016 killing of his brother‑in‑law, Thomas "Tom" Niblo; jury assessed life imprisonment and a $10,000 fine. Appellant appealed raising a single issue under Article 38.35.
Evidence of motive and opportunity: long‑running family dispute over estate/LLC control, financial stress, incriminating journal entries, missing spare key to the Niblo house (which Sweetser had seen), size‑13 boot impressions at the scene, and phone/GPS records placing Sweetser near the warehouse and Niblo property.
Physical evidence: spent .40 cal casings at the scene; a muddy Glock .40 (Model 22) was recovered from a creek ~880 feet from the house two years later and traced to Sweetser as the original purchaser.
Ballistics testing: Alliance Forensics’ examiner Richard Ernest concluded the recovered Glock fired the cartridge cases; Ernest performed work in 2018 and 2020 but surrendered his Commission license in January 2020 and Alliance was not accredited at the time of some testing.
Trial court held an outside‑the‑jury hearing, found Ernest qualified, and admitted his testimony over defense objection that admission violated Art. 38.35(d)(1) (laboratory accreditation requirement).
On appeal the court held admission of Ernest’s forensic testimony violated Article 38.35(d)(1) but deemed the error harmless under Tex. R. App. P. 44.2(b) given overwhelming other evidence linking Sweetser to the murder; conviction affirmed.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether admission of ballistic expert testimony violated Art. 38.35(d)(1) because the testing lab was not accredited at time of analysis	Sweetser: Ernest’s forensic analysis/testimony inadmissible; Alliance Forensics was not accredited when tests were performed per Art. 38.35	State: Ernest was qualified; Commission verbally authorized him to finish open cases so testimony admissible	Court: Admission violated Art. 38.35(d)(1) (error), but error was harmless under Rule 44.2(b); conviction affirmed

Rhomer v. State, 569 S.W.3d 664 (Tex. Crim. App. 2019) (standard of review for evidentiary rulings)
Hargett v. State, 472 S.W.3d 931 (Tex. App.—Texarkana 2015) (Article 38.35 exclusion applied; harm analysis required)
King v. State, 953 S.W.2d 266 (Tex. Crim. App. 1997) (Rule 44.2(b) substantial‑rights/harm standard)
Solomon v. State, 49 S.W.3d 356 (Tex. Crim. App. 2001) ("fair assurance" harmless‑error inquiry)
Sexton v. State, 12 S.W.3d 517 (Tex. App.—San Antonio 1999) (discussed reliability/admission of ballistics evidence; remand and harm analysis in later proceedings)
Kelly v. State, 824 S.W.2d 568 (Tex. Crim. App. 1992) (reliability standard for expert forensic testimony)