Records released after a woman appeared in court detail the day when authorities were made aware of a baby found dead in a trash can at an Amazon facility in west Phoenix. Samantha Vivier, 22, of Tonopah was arrested and booked into jail Tuesday afternoon on one count of Unlawful Disposal of Human Remains.

Phoenix police had responded to the facility near 51st Avenue and Lower Buckeye Road around 8:30 p.m. Jan. 16 for a call of a dead infant in the restroom. The Phoenix Fire Department arrived and declared the baby dead.

According to court documents, a witness told police he encountered Ms. Vivier near the restroom around 2:20 p.m. She had told him she was sick and no one should enter the restroom. She had been in there for hours, during which she reportedly gave birth to a female infant. Ms. Vivier would later tell police the baby was not breathing or moving. She then left the building around 3:30 p.m., records state. A janitor entered the restroom around 8 p.m., discovering the trash bag heavier than normal and then finding another bag inside with a baby in it. Police contacted Ms. Vivier, who said she gave birth while on shift. At no point did she seek medical care. Authorities interviewed her Tuesday, the same day of her arrest and first appearance in court. "Samantha stated that she did not know that she was pregnant, and she did not have any signs or indications that she might be pregnant," records state. "Samatha said she gained approximately fifteen pounds and did not feel the baby moving inside of her." Ms. Vivier reportedly hid the baby inside the trash can to prevent the infant from being discovered and to hide the birth from the possible father. She was released on her own recognizance with court dates Feb. 5 and 11.

The investigation will continue in partnership with the Maricopa County Office of the Medical Examiner and the Maricopa County Attorney's Office.

Amazon said in a statement last week that the company was working with police to support the investigation and called the incident "terribly sad and tragic." The company's massive distribution center on the city's southwest side is one of several Amazon sites in metro Phoenix. Under Arizona law, mothers can anonymously leave unharmed newborns at designated "safe haven" locations. They include hospitals, ambulances, churches, on-duty fire stations and adoption agencies. The baby must be under 72 hours old and given to a person. The law, which was passed in 2001, also states the mothers who follow those instructions will not face prosecution. The Associated Press contributed to this report.