ORANGE, Calif.–A 31-year-old La Habra woman was in custody today on suspicion of throwing her 7-month-old son from a parking structure at Children’s Hospital Orange County, leaving him critically injured.

The baby was listed in very critical condition after being thrown from the second, third or possibly the fourth floor of the structure at 455 S. Main St. around 6:20 p.m. Monday, Orange police Sgt. Dan Adams said.

“We don’t think this was an accident,” Adams said.

The break in the case came after the husband of Sonia Hermosillo contacted La Habra police about his missing wife and son. La Habra police then called the Orange police about the report, Adams said.

The license plate of a tan 2000 Chevy Blazer was captured on video surveillance tape at the parking structure, Adams reported. Detectives determined that Hermosillo had been driving a vehicle that matched the one seen in the surveillance footage.

At 10:15 p.m. Monday, Hermosillo’s vehicle was seen by an Orange police officer being driven past Children’s Hospital. Officer stopped the Blazer and detained Hermosillo. An empty child seat was found in the vehicle, Adams said.

Hermosillo was brought to the Orange Police Department for questioning.

She was then arrested and booked into Orange County jail on suspicion of one count of attempted murder, Adams said.

Bail was not immediately set.