We've learned a lot more tragic information regarding the missing 11-month-old who was found in an old steam tunnel in Upstate New York.

Hudson Valley Post previously reported on the death of a missing 11-month-old.

Tragic End To Frantic Search For Missing Upstate New York Infant

For all the news that the Hudson Valley is sharing make sure to follow Hudson Valley Post on Facebook, download the Hudson Valley Post Mobile

Over 120 Officers Search For Missing Infant At GE Campus In Schenectady

Over 120 officers searched for Halo, including the FBI, in the area of the General Electric campus in Schenectady, New York.

Hudson River Cleanup
Getty Images

A team of Schenectady Police SWAT members and a Forest Ranger soon found Halo in an old steam tunnel, the DEC states.

She was pronounced dead at the hospital, the DEC confirmed. CLICK HERE to read more about the search for Halo.

Schenectady, New York Mother Charged

Following an investigation, Halo's mother, Persia Nelson was arrested.

Persia Marie/FB
Persia Marie/FB

Nelson was originally charged with manslaughter but charges were upgraded to second-degree murder and depraved indifference to human life.

Read More: New Year Brings 2 New Holidays To New York State

Officials allege Nelson dropped her 11-month-old daughter down a pipe access area near General Electric that was filled with mud and debris Saturday night.

Ties To Brooklyn, Columbia County

Nelson lives in Schenectady, New York and is from Brooklyn, according to her Facebook. She also has ties to Hudson, in Columbia County, New York.

Sad News: These 11 Popular Food Items Are Gone From New York State Stores

Mother Makes Alarming Facebook Post Before Child's Disappearance

Persia Marie/FB
Persia Marie/FB

Halo was last seen on Saturday at about 9:15 p.m., according to the Schenectady Police Department.

About one hour before Halo went missing, her mother posted on Facebook stating she was very "drunk."

Search Continues For Other Missing Children In New York

Can you help? Nearly 30 children recently went missing in New York State.

See the full list below:

29 Kids Have Gone Missing in New York Already in 2024

29 kids have gone missing in the first two months of 2024. Take a look to see if you recognize any of them and can help bring them back home.

Gallery Credit: Credit - Polly McAdams

Missing: 20 Kids Disappear From New York State Around Holidays

If You See Purple Paint in New York You Need To Leave Right Away

Do you know what to do if you see purple paint in New York State? The easiest advice, run. Here's why. 

Giant Horror Plant

A "giant horror plant" that can cause blindness and severe burns is still in New York State, despite the best efforts from New York officials.

More From Hudson Valley Post