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People of Michigan v. Dennis Kristofer Therrian
331717
| Mich. Ct. App. | May 9, 2017
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Background

  • Defendant Dennis Therrian was convicted by a jury of three counts of first‑degree criminal sexual conduct and one count of second‑degree criminal sexual conduct for sexually abusing his biological son; sentences were concurrent (25–50 years for CSC‑I; 10–15 years for CSC‑II).
  • Defendant appealed, arguing trial counsel was ineffective for multiple failures (not calling an expert on false child allegations, failing to impeach the victim’s mother, failing to present other impeachment evidence).
  • No Ginther hearing or new‑trial motion was held in the trial court on the ineffective‑assistance claim; the claim was therefore unpreserved and review is limited to record‑apparent errors.
  • The record showed defense counsel cross‑examined the child and mother and emphasized inconsistencies and motives; counsel also declined to pursue some lines of inquiry after evidentiary developments.
  • The Court applied the Strickland two‑prong test (performance and prejudice) and found defendant failed to establish deficient performance or prejudice; the child’s testimony alone was sufficient to support the convictions.

Issues

Issue Plaintiff's Argument Defendant's Argument Held
Whether trial counsel was ineffective for not calling an expert on false child abuse allegations Prosecution: counsel’s decisions were reasonable trial strategy; record shows cross‑examination targeted credibility Therrian: absent expert, jury wasn’t informed why children might fabricate or distort allegations Court: No record proof counsel consulted/declined expert; counsel reasonably relied on cross‑examination; no prejudice shown
Whether counsel should have impeached the victim’s mother with alleged CPS/history evidence Prosecution: defendant failed to establish the factual predicates for such evidence; mother’s testimony was not central to elements Therrian: mother may have been anonymous complainer and had prior false accusations and convictions that show dishonesty Court: No proof mother was anonymous caller; prior convictions inadmissible or stale; mother’s testimony wasn’t essential; no prejudice
Whether counsel erred by withdrawing or not pursuing certain extrinsic allegations (prescription theft, prior assault) Prosecution: trial counsel properly avoided mini‑trials and strategic choices were reasonable Therrian: counsel abandoned lines that would show mother fabricated accusations Court: Withdrawal was reasonable after prosecutor presented a police report; defendant not entitled to trial within a trial; no deficient performance
Whether the cumulative effect of alleged errors requires reversal Prosecution: no objectively unreasonable acts to aggregate; only actual errors are aggregated Therrian: combined omissions prejudiced outcome Court: No individual errors shown; cumulative‑error claim fails

Key Cases Cited

  • Strickland v. Washington, 466 U.S. 668 (1984) (two‑prong test for ineffective assistance: performance and prejudice)
  • People v. Vaughn, 491 Mich. 642 (2012) (applying Strickland; strong presumption counsel competent)
  • People v. Trakhtenberg, 493 Mich. 38 (2012) (counsel must investigate or reasonably conclude investigation unnecessary)
  • People v. Szalma, 487 Mich. 708 (2010) (victim’s testimony alone can support sexual‑conduct convictions)
  • People v. Hoag, 460 Mich. 1 (1999) (defendant must establish factual predicate for ineffective‑assistance claims)
  • People v. Chapo, 283 Mich. App. 360 (2009) (trial counsel responsible for presenting substantial defenses)
  • People v. Dunigan, 299 Mich. App. 579 (2013) (witness choices and evidence presentation presumed strategic)
  • People v. Mack, 265 Mich. App. 122 (2005) (when no Ginther hearing, review limited to record‑apparent errors)
  • People v. Kurylczyk, 443 Mich. 289 (1993) (clear‑error standard explained)
  • People v. LeBlanc, 465 Mich. 575 (2002) (cumulative‑error doctrine considers only actual errors)
Read the full case

Case Details

Case Name: People of Michigan v. Dennis Kristofer Therrian
Court Name: Michigan Court of Appeals
Date Published: May 9, 2017
Docket Number: 331717
Court Abbreviation: Mich. Ct. App.