Frances Caso was initially jailed on various child endangerment and drug possession charges after onetime child model Trinity Caso Perez overdosed on May 25.
Further investigation led to the more serious charge, Bergen County Prosecutor Mark Musella said on Friday, May 31.
Fort Lee police responding to a 3:34 p.m. call last Saturday found the lifeless child at Caso's Maple Street home.
The youngster was pronounced dead soon after at Hackensack University Medical Center, Musella said.
โDuring the course of the investigation, it was determined that Frances Caso and three other juveniles were also present in the residence around the time of the suspected overdose,โ the prosecutor said.
Prosecutorโs detectives armed with a search warrant found various illegal drugs and โparaphernalia used to ingest controlled dangerous substances,โ he said, without elaborating.
Musella also didn't explain the circumstances under which Trinity ingested the drugs.
A criminal complaint on file in Superior Court in Hackensack says there were heroin and Ecstasy pills present.
Aggravated manslaughter can be charged in New Jersey when authorities believe the defendant recklessly caused another person's death while showing extreme disregard or indifference to human life.
Caso has remained held at theย Hudson County Correctional Facility in Kearny.
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