AMARILLO, Texas (KFDA) - An arrest warrant reveals a mother charged with leaving her 3-year-old son with her boyfriend the day of his brutal beating knew about prior abuse.

Chelsea Berg is accused of leaving her son Dawson Zamora with Christopher Alexander the day he was brutally beaten.

Dawson has been in the hospital and on life support since October 14.

The arrest warrant for Berg says Alexander brought Dawson to Medical City McKinney and told hospital staff he heard a “thud” and found him with serious injuries.

Hospital staff notified police when they suspected that his injuries were inconsistent with a single fall. Dawson’s injuries include severe brain trauma, bruising in various states of healing over his entire body and more.

When Berg saw photos of his injuries, she was ada

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