Marlen Ochoa-Lopez was murdered on Chicago's Southwest Side in 2019, and her infant son, Yovanny Lopez, died two months later.
WATCH: Artist adds baby Yovanny to memorial mural for Marlen Ochoa-Lopez
Clarisa Figueroa and her daughter, Desiree, were charged with first-degree murder for the deaths of Ochoa-Lopez and her newborn son.
Prosecutors said Clarisa Figueroa lured 19-year-old Marlen Ochoa-Lopez to her Southwest Side home with the promise of free baby clothes, then allegedly killed the young woman with the help of her daughter and removed Ochoa-Lopez's baby from her womb.
Clarisa Figueroa was allegedly able to pass off the baby as her own for weeks, prosecutors said. The infant boy later died at Advocate Christ Medical Center.
Yovanny's family held a vigil on Sunday, asking people to honor the baby through an act of kindness.
After the vigil, the family's first act of kindness was delivering meals to Chicago police officers on the city's South Side.
Marlen Ochoa-Lopez death: Virtual candlelight vigil to be held on 1-year anniversary of murdered pregnant Chicago teen mom
Marlen Ochoa-Lopez death: Friends, family mark 20th birthday of slain pregnant woman
Marlen Ochoa-Lopez baby death: Clarisa, Desiree Figueroa plead not guilty
Marlen Ochoa-Lopez death: Mother, daughter charged with murder in baby's death
Artist unites murdered pregnant teen mom and baby on Pilsen memorial mural
Marlen Ochoa-Lopez's family outraged after state clears hospital in her baby's case
Christ Medical Center acted properly in Marlen Ochoa-Lopez baby case, investigation finds
Marlen Ochoa-Lopez death: Baby of murdered pregnant Chicago woman dies, family spokesperson says
Marlen Ochoa-Lopez death: 3 suspects in murder of pregnant Chicago woman formally indicted
Marlen Ochoa-Lopez baby: Family gets 2nd opinion on infant's prognosis
Family, community says final goodbye to Marlen Ochoa-Lopez
Marlen Ochoa-Lopez's visitation continues Friday; Murdered woman's baby remains hospitalized
Marlen Ochoa-Lopez Death: Murdered Pilsen woman's family arrives in Chicago, visits baby in hospital
Marlen Ochoa-Lopez Death:'We can still find hope': Artist creates mural of murdered Pilsen woman
Marlen Ochoa-Lopez Death: Murdered Pilsen woman's family arrives for funeral, health department investigating Christ Medical Center
Marlen Ochoa-Lopez's family seeks answers why authorities were not alerted to Figueroa
DCFS, police not alerted to Marlen Ochoa-Lopez death suspect despite no signs of giving birth, officials say
Funeral set for murdered pregnant woman Marlen Ochoa-Lopez
Marlen Ochoa-Lopez death: 3 charged in murder of pregnant Chicago woman denied bond
Marlen Ochoa-Lopez death: 3 charged in murder of Chicago missing pregnant woman, 19, on Southwest Side