David Schindel was used to waking up to sounds of mayhem when he lived with Alison Kimberly Muise and Christopher Mattern at their Westdale townhouse.

“It’s something I heard frequently,” Schindel told a Winnipeg court Wednesday. “It was a household that was always chaotic.”

But on Feb. 22, 2022, after 20 minutes of listening to the sounds “screaming, yelling, wailing, and stamping back and forth,” Schindel emerged from the basement to a shocking sight unlike anything he had seen.

“In the living room I could see Chris crouched over (his three-month-old daughter),” Schindel said. “He was screaming, yelling, crying.”

The baby was “grey, purple… food was coming out of her nose,” he said. “I was stunned by what I saw.”

Neither Mattern, 40, nor Muise, 41, had called 911, so he did, Schinde

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