Piotr Bobak, 40, whom police described as the elder Figueroa's boyfriend, was charged with concealing the murder.
Within four hours of when Ms Ochoa-Lopez was last spotted driving on a road by surveillance cameras, the elder Figueroa called emergency services claiming she had delivered a baby that was not breathing.
The nine-months-pregnant teen went to Figueroa's home expecting to gather some baby clothes and other donated items, police said. Authorities were to release the names of those arrested later Thursday. One of Ochoa's friends told detectives about the Facebook group she was in, prompting them to look into the group.
Ochoa-Lopez's family had been looking for her since her disappearance on April 23, organizing search parties and holding news conferences as they pushed police for updates in the investigation.
Quinet's research shows that most babies survive, but far fewer of their mothers do. Her unborn baby was then ripped out of her dead body.
Figueroa and her daughter, Desiree Figueroa, 24, were each charged with first-degree murder and felony aggravated battery to a child less than 13 years old causing permanent disability.
The infant was rushed to the hospital in critical condition, officials told local media outlets.More news: Who might step into Allegri's shoes at Juventus?
Ochoa-Uriostegui's son, named Yadiel Yovany Lopez by his father and Ochoa-Uriostegui's husband, Giovanni Lopez, is now in hospital on life support. But he prayed for a miracle for the newborn.
The young woman had organised to collect baby clothes from a woman she met on a Facebook group, "Help a Sister Out", which has since been closed. Meanwhile, The Associated Press reported that three people were taken into custody.
Johnson told reporters: "Through DNA testing we are now certain the child was Ms. Ochoa's".
Sara Walker says detectives tested the saliva of the baby and that of the baby's father along with hair samples taken from the home of 19-year-old Marlen Ochoa-Lopez to determine parentage.
Her body was found on May 14th in a bin on a property, following interviews and DNA evidence. Charges are expected to be filed Thursday afternoon.
"Instead, they're mourning the loss of the mother and possibly that young child", Johnson said.
"She was giving clothes away, supposedly under the pretense that her daughters had been given clothes and they had all these extra boy clothes", she said.More news: Liverpool: What Jurgen Klopp plans to do to ensure Champions League glory
A mother and her daughter have been charged in the killing.
Police suspect the woman and others in the home killed Ochoa-Lopez and cut the baby boy from her womb.
On the same day, paramedics were called to the address in the south-west of the city to attend to a newborn with breathing problems.
This story has been corrected to reflect the baby as a boy.
Now, as the family prepares to bury the 19-year-old -whose baby was cut from her after she was strangled - her parents want to fulfill her wish.
According to The Washington Post, after the body was found, Ochoa-Lopez's husband, Yovany Lopez, tearfully told reporters, "Why did these bad people do this?"
No charges have been announced. The family spoke in Spanish outside the Cook County medical examiner's office.More news: ‘Minecraft’ Your World in Upcoming Mobile AR Game
She was seen three weeks ago after leaving Latino Youth High School and was supposed to pick up her 3-year-old son from day care.
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