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HAMMOND, Ind.— Police say a 15-year-old boy is being held in connection with two rapes and the fatal stabbing of a woman in northwestern Indiana.

Hammond police said Monday that DNA evidence linked the teen to a 14-year-old girl’s July 26 rape and the Aug. 8 rape of a 25-year-old woman.

The (Northwest Indiana) Times reports officials declined to discuss whether DNA evidence also linked the boy to the Aug. 22 killing of 25-year-old Lucia Gonzales, citing a gag order. Authorities did say he is a suspect in the killing, and that the homicide could be linked to the rapes.

Gonzales died from injuries consistent with blunt force trauma and stab wounds. Her body was found by her 6-year-old son, who brought his two siblings to a neighbor’s home while seeking help.

The teenager remained in juvenile custody Monday. His attorney says no formal charges have been filed against his client.