214 · 585 · 0094
Insurance Defense Litigation · Est. 1993

Defense counsel for Texas insurers, built on three decades of courtroom results.

Harrison Hull & Mumm represents insurance carriers, their insureds, and self-insured entities across Texas — from motor-vehicle and commercial trucking defense to coverage opinions, fraud investigations, and municipal liability.

Established
1993
Office
McKinney, Texas
Jurisdictions
TX · OK · NM

A smaller firm, by design.

We keep the roster focused so every file gets a senior hand. Carriers retain us because the lawyer assigned to the case is the lawyer who tries it.

Since 1993, Harrison Hull & Mumm has been defense counsel to national and regional insurance carriers and their insureds throughout Texas, Oklahoma, and New Mexico. The work is deliberate — coverage analysis first, defensible strategy second, trial readiness throughout. We don't churn files, and we don't pad bills.

Our attorneys try cases. That's not marketing — it's how we're staffed and how we prepare. When settlement is the right outcome, we earn it from a position of credible trial readiness, not from avoidance.

Est. 1993

Three decades of Texas defense work — and the same philosophy we started with.

30+
Years in practice
3
Jurisdictions
7
Texas attorneys

Four areas, each a core competency.

i.

Insurance Defense Litigation

Motor vehicle and commercial trucking defense, premises liability, general casualty, and UM/UIM claims. State and federal courts across Texas.

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ii.

Insurance Fraud Investigations

Examinations under oath, recorded statements, and coordinated SIU support. Written opinions on coverage, misrepresentation, and fraud indicators.

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iii.

Insurance Coverage

Coverage opinions, declaratory judgment actions, reservation-of-rights analysis, and extracontractual defense. Counsel to carriers on first- and third-party policies.

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iv.

Governmental & Municipal Defense

TMLIRP-appointed defense of Texas political subdivisions and their officials in civil rights, tort, and employment matters — municipalities, counties, and special districts.

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The lawyers on the case.

ii.
Of Counsel
Richard E. Harrison — firm founder (1993), continuing in an of-counsel capacity.
Where We Practice
112 West Virginia Street McKinney, Texas

Our offices sit on the historic square in downtown McKinney — the county seat of Collin County, one of Texas's fastest-growing and most prosperous counties. From here, we serve clients throughout North Texas.

Counties regularly served
  • Collin
  • Dallas
  • Denton
  • Tarrant
  • Rockwall
  • Grayson
  • Hunt
  • Kaufman
  • Ellis
  • & beyond