MINNEAPOLIS (WCCO) — Prosecutors charged a Glencoe man with assault Saturday for shaking a baby so hard, it caused a “massive brain injury.”

Timothy Daniel Miller, 23, is facing one charge of first degree assault with great bodily harm.

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According to the criminal complaint, Miller told police when they arrived at his home Jan. 4 that he became frustrated with the 5-month-old boy and shook him “approximately five times.” He then noticed the baby’s eyes roll back in his head as it started having trouble breathing.

According to a Facebook page created by the baby’s mother, Miller was the baby’s daycare provider.

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Timothy Daniel Miller (credit: McLeod County Sheriff’s Office)

The baby was taken to Children’s Hospital in St. Paul, where a doctor determined he had suffered a subdural hemorrhage and a “massive brain injury.”

If convicted, Miller could face up to 20 years in prison and a $30,000 fine.

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You can donate to the family for the baby’s medical expenses via their GoFundMe page.