A 7-month-old Antioch girl was found dead Sunday afternoon in a vehicle parked in the lot at In Shape Sports Club on Lone Tree Way. She had been left in the car seat overnight in the driveway of her home.

The parents, who were distraught when interviewed by police, “both work two jobs, and both thought the other parent had the baby,” said Antioch Police Sergeant Diane Aguinaga in a press release. “The father woke up and went to the gym, thinking all was fine. When the mother awoke and checked on her children, she discovered that the baby was not in her crib. She called the gym, where her husband was working out. He was alerted by gym staff, ran outside to his vehicle, and discovered his child deceased.”

The girl had been in the car since 11:30 p.m. Saturday and was discovered just after 2 p.m. on Sunday. The temperature dropped to 52 degrees during the night and reached 78 degrees the following afternoon.

The couple’s other child, age 2, was placed into the care of Children and Family Services while the investigation continues. “Our best estimate is it will probably be about a month before we can bring it to the DA’s office so they can make a decision on whether or not they want to file charges” for child endangerment, said Lt. Leonard Orman.

Anyone with information can contact Detective Santiago Castillo at 925-779-6933.