Aunt accused of throwing 3-year-old boy into water off Navy Pier.

As her 3-year-old nephew crawled near the edge of Navy Pier, Victoria Moreno looked around to see if anyone was watching, bent down, scooped the boy with both hands and threw him into the water, prosecutors charged Wednesday

Moreno then sat down and stared as the child sank beneath the surface, prosecutors said in a court statement that brought observers to tears.

“Not once during any of these events did the defendant scream for help, call for help, ask for help or try herself to help,” Assistant State’s Attorney Lorraine Scaduto said during Moreno’s bond hearing. “When the police arrived, the defendant pretended not to know anything about the child.”

It was 30 minutes before divers found the boy at the bottom of the lake, and he was in cardiac arrest when they pulled him from the water Monday afternoon. Paramedics revived him and brought the boy to Lurie Children’s Hospital, but Scaduto said the boy is not expected to survive.

The child’s father has been unable to see his son because he is hospitalized at Loyola Medical Center, awaiting a heart transplant, according to the family.

Judge Susanna Ortiz denied bail for Moreno, 34, despite defense arguments that she suffers from mental issues and may have experienced a breakdown. The judge called Moreno’s actions “intentionally brutal and heinous.”

Her ruling came after a detailed account by prosecutors of Moreno’s actions that day:

Moreno had slipped out of the family home in Des Plaines with the boy in the morning while another aunt went to wake up her kids and his grandmother went to change, according to Scaduto.

Moreno “stole the keys” to the family’s truck and “snuck out of the residence without anyone knowing that she had left,” Scaduto said. The other aunt no longer heard the boy talking “and became alarmed,” the prosecutor said. That’s when she noticed Moreno and the boy were gone, and the truck was missing.

Moreno wasn’t allowed to drive because she takes medication for “mental health issues” and because of an alarming incident a week earlier when she drove off with several children, Scaduto said.

Moreno initially attempted to take the boy to the Shedd Aquarium but decided to get him food at Navy Pier. After leaving the restaurant, the boy wandered into a street and was nearly struck by a car coming out of a parking garage, Scaduto said.

Moreno grabbed the child and began walking with him on the sidewalk close to the water. The child crawled under one of the barrier chains and was on all fours, about 3 feet away from the edge and the 6-foot drop to the water.

Moreno took hold of the child’s foot and pulled him back, “apparently because there were several people in the immediate vicinity,” Scaduto said.

“The defendant looked around her multiple times and waited for people to leave, looking around once again, and when no one was present, she allowed the 3-year-old child to crawl back under the chain toward the edge of the platform — doing nothing,” Scaduto said.

Moreno then climbed over the chain, straddled the child and pushed him off the platform with both hands, Scaduto said. She walked several feet away and stood on the sidewalk, “again doing nothing,” while passersby called 911 and threw a life preserver in the water, the prosecutor said.

“Again, the defendant stood by and did not do anything, did not offer to help the child and also claimed she did not have a phone on her to make any calls,” Scaduto said.

The boy is suffering from a swollen brain and bleeding in his lungs and has experienced multiple seizures and multiple events of cardiac arrest, Scaduto said.