Woman's Boyfriend BEAT HER TODDLER SON To Death . . . And KIDNAPPED Her Daughter . . . Police Fear He May Be 'ABUSING' The Girl!!!

Minnesota police are looking for a man who they say killed his girlfriend's toddler and kidnapped her 5-year-old daughter.

Police claim that 24-year-old Nelson Geovanny Soto-Lopez brutally beat his girlfriend's 21-month-old boy to death.

Nelson also is believed to kidnapped his girlfriend's 5-year-old daughter Cristal. Cristal was last seen wearing a brown and black jacket with purple pants and brown shoes.