BUFFALO, N.Y. (WIVB) — A Buffalo man will spent 20 years in prison and five more years of post-release supervision for assaulting his girlfriend’s infant daughter, resulting in her death.

On September 15, 2020, 37-year-old Robert L. Dumas repeatedly assaulted the 17-month-old at a home on Hirschbeck Avenue in Buffalo. She was taken to Oishei Children’s Hospital and died on September 19, 2020 due to blunt force trauma.

Dumas pleaded guilty to one count of manslaughter last month.

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Aidan Joly joined the News 4 staff in 2022. He is a graduate of Canisius College. You can see more of his work here.