Dennis Bieg, 44, was shot in the back and died after being found near River Des Peres Boulevard and Wanda Avenue in St. Louis on November 7, 2023. Officers arrived about 4:15 p.m.; Bieg, a St. Louis County resident, was taken to a hospital where he succumbed to his injuries.

Investigators arrested 36-year-old Erik Seitz and charged him with first-degree murder and armed criminal action. Court papers say the alleged motive involves a love triangle between Bieg, his wife, and Seitz. Witnesses told police they saw Bieg shot in the back while walking away. Bieg’s wife admitted a romantic involvement with Seitz; an ex-girlfriend of Seitz said Bieg had texted her to come to the park and that she heard gunshots and saw Bieg bleeding. Seitz told officers Bieg hit him with an object, causing him to black out, and denied having a gun or shooting.

A red work van from Bieg Plumbing was at the scene and was towed; the company said the shooting was unrelated to his work.

If anyone witnessed the shooting or has information about what happened in the park that afternoon, please share what is known.