CHICAGO (AP) — An infant boy who was cut from a Chicago woman’s womb with a butcher knife died Friday at a hospital where he had been in grave condition since the April attack that killed his mother, family spokeswomen said.

Yovanny Jadiel Lopez died at Christ Medical Center in suburban Oak Lawn from a severe brain injury, according to a statement posted on Facebook by family spokeswoman Julie Contreras, who expressed “great sadness” in announcing the baby’s death. Family spokeswoman Cecilia Garcia confirmed the statement.

The baby had been on life support since being brought to the hospital on April 23. Prosecutors say Clarisa Figueroa, 46, claimed she had given birth to the baby. She and her 24-year-old daughter, Desiree Figueroa, are charged with murder in the death of the baby’s mother, 19-year-old Marlen Ochoa-Lopez, and Chicago police spokesman Anthony Guglielmi said Friday that he expects both women will now be charged with murder in the infant’s death.

Prosecutors will “make a determination on additional charges” after police and the county’s medical examiner’s office complete their investigations, Cook County State’s Attorney’s Office spokeswoman Tandra Simonton said in a written statement. An attorney for the family, Frank Avila, demanded that the office charge the two women with murder, and charge the Figueroa’s boyfriend, Piotr Bobak, with murder as well. Bobak has been charged with concealing a homicide.