HOUSTON -

A Child Protective Services case worker remains hospitalized after she was attacked Tuesday while investigating a report of an abused baby.

According to Houston Police, the baby's parents and a friend beat and choked the 23 year old woman until she lost consciousness.

Case worker Stephanie Vera went to the Somerset Apartments in the 8000 block of W. Tidwell around 5 p.m. Tuesday to check on the well being of a one year old infant.

According to CPS supervisor Estella Olguin, “We were investigating allegations of medical neglect, neglect of supervision and and physical abuse. The reason the visit at the home was to conduct that investigation.”

Olguin says Vera was trying to arrange to have a relative take custody of the baby while the parents were being evaluated. During that discussion, the baby's father, identified as Troy Davis, 21, became angry, grabbed Vera and locked the apartment's front door. Police say Davis punched Vera in the head, then grabbed her by the throat, and slammed her against a wall. During the struggle, Vera managed to dial 911, but the call was cut short when Davis grabbed the phone.

According to investigators, Davis continued to choke her until she lost consciousness, while Davis’s friend, Shane Hensworth Douglas, 21 allegedly threatened Vera with a knife. The baby's mother, Karissa Marie Ferringno, 19, allegedly looked on during the confrontation. When the fighting started, police say the baby's grandmother took the child and left the apartment.

Vera was rescued by Houston Police officers who responded to her 911 call. They arrested Davis, Douglas and Ferrigno. All three were charged with aggravated assault and aggravated kidnapping. They are being held under $30,000 bond each.

CPS took custody of the baby. She has been placed in a foster home.

Vera remains hospitalized with injuries to her head and neck.