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Calleen Barton, 58, and Lakeisha Lewis, 28, are charged with first-degree murder in the toddler's death in their unit at the Eagle Lakes apartment complex. His mother, Brandi Mokarzel, was arrested on charges of child neglect.
Watch: Third woman charged in 3-year-old's death faces judge
Arrest reports for all three women detail how the boy's mother tried to protect him, but deputies say she could have better protected him by getting away from her two roommates sooner.
According to the documents, Barton beat the toddler with a plastic rod used to open window blinds until it broke. She then threw him down a hallway, causing his neck to turn and his body to start shaking "like he was seizing."
Watch: Father of 3-year-old who died in Pine Hills speaks out
His mother, who was in the apartment at the time, tried to call police, the report said, but Barton knocked her cellphone out of her hands and told her if she called police, she would "end" her.
Mokarzel told deputies Barton threatened her because she didn't want to lose another child to Child Protective Services, the report states.
The boy's mother then ran to a neighbor's unit to call 911 and came back to find her son lying on his back with "food coming from his nose," the report said.
Read: 2 Pine Hills women face first-degree murder charges in connection with 3-year-old's death
According to the report, Mokarzel told deputies that both Barton and Lewis had struck her son in the past, leaving marks on his body.
"Based on this statement Brandi has demonstrated a neglect to care for her son's safety and allowed him to remain in a non-safe environment that has now led to his death," the report said.