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Mata-Garza — Court disregards improperly joined Texas defendants and retains diversity jurisdiction

Reported / Citable

Case
Laura Mata-Garza, as Representative of the Estate of Adan Mata, et al. v. Union Pacific Railroad Company, et al.
Court
U.S. District Court for the Southern District of Texas, Houston Division
Judge
Dena Hanovice Palermo, United States Magistrate Judge
Date Decided
October 26, 2026
Docket No.
4:26-cv-07439
Topics
Diversity Jurisdiction; Improper Joinder; Removal; Wrongful Death

Background

Adan Mata was struck and killed by a train at a railroad crossing. His relatives sued Union Pacific Railroad Company and the Lujans in Texas state court, asserting negligence, gross-negligence, and premises-liability claims. The plaintiffs alleged that the Lujans, Texas citizens, owned the accident site or adjacent property and failed to warn of approaching trains, maintain signage, inspect the premises, and address dangerous conditions.

The Lujans sought summary judgment, submitting evidence that they did not own, operate, or control the accident site. After discovery, the plaintiffs acknowledged that they lacked evidence disputing that showing and attached discovery responses from the defendants supporting it. Union Pacific later removed the case based on diversity jurisdiction and improper joinder. The plaintiffs did not seek remand, subsequently dismissed the Lujans, and joined Union Pacific in asking the federal court to exercise diversity jurisdiction, although they disputed that the Lujans had been fraudulently joined.

The Court’s Holding

The court held that the Lujans were improperly joined because there was no reasonable basis to predict that the plaintiffs could recover against them. Using a summary inquiry that considered evidence beyond the pleadings, the court found the record undisputed that the Lujans did not own the property where Mata was killed. Under Texas law, they therefore owed no duty concerning the accident site, and the premises-liability, negligence, and gross-negligence claims against them could not survive a Rule 12(b)(6)-type analysis.

Because the Lujans were improperly joined, the court disregarded their Texas citizenship. Complete diversity then existed between the plaintiffs, citizens of Texas and Colorado, and Union Pacific, a citizen of Utah and Nebraska. The court concluded that it could exercise jurisdiction under 28 U.S.C. § 1332 and granted the parties’ joint letter motion.

Key Takeaways

  • A federal court must independently examine subject-matter jurisdiction even when all parties agree that jurisdiction exists.
  • An in-state defendant’s citizenship may be disregarded when undisputed evidence eliminates any reasonable basis for recovery against that defendant.
  • The Lujans’ lack of ownership or control over the accident site defeated the duty element of the plaintiffs’ Texas-law claims against them.

Why It Matters

The order illustrates how improper joinder can preserve federal diversity jurisdiction despite the presence of nondiverse, forum-state defendants when record evidence establishes that they cannot be liable. It also shows that a court conducting the permitted summary inquiry may consider affidavits, maps, photographs, deposition excerpts, and discovery responses while resolving contested facts and legal ambiguities in the plaintiffs’ favor.

Here, the defendants’ evidence—and the absence of contradictory evidence after discovery—established that the Lujans did not own or control the accident site. Their dismissal after removal did not create jurisdiction; rather, the court concluded that their citizenship was properly disregarded because they had been improperly joined when the case was removed.

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