Hoisser told police that he grew frustrated while watching Gus, who had been "fussy" and "difficult," on April 24, according to Washington County court documents. Hoisser then "intentionally dropped the infant head first into the ground," the documents said.

The next day, emergency crews took Gus to a nearby hospital after he became unresponsive at day care, WCCO-TV reported. Doctors found that the boy had suffered severe head trauma, which likely would render him "permanently blind, deaf and immobile" if he survived, according to the news station. He later died.