Jeida Torres, 3, was found unresponsive in her Brooklyn area apartment on Saturday. (Credit: WPIX)

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A 20-year-old New York man was charged with second degree murder Monday for allegedly beating his 3-year-old stepdaughter to death after becoming enraged that the toddler had soiled her clothing, authorities said.

Police responding to 911 calls from a neighbor on Saturday found Jeida Torres unresponsive. Her 5-year-old brother also showed signs of being beaten.

The girl was rushed to the hospital where she was pronounced dead. Her brother was listed in stable condition at another hospital.

Kelsey Smith was reportedly watching the youngsters while their mother was at work.

CNN and WPIX contributed to this story.