Phoenix ? A woman who found her 1-year-old son dead in her hot, stuffy car after she worked her seven-hour shift as a Hooters waitress has been arrested, police said Wednesday.

Ashly Duchene, 22, was booked into the Maricopa County jail Wednesday on a felony count of negligent homicide.

Duchene usually dropped the boy off at a day-care center on her way to work but failed to do so Tuesday, police Sgt. Joel Tranter said.

Instead, she left her son, Ryan Gallagher, in the car when she arrived at the restaurant about 10 a.m., police said. When she returned after her shift at nearly 5 p.m., he was dead.

Temperatures hit nearly 90 degrees Tuesday, but it would have been more than 100 degrees inside the car, Tranter said.

Authorities do not believe Duchene intentionally left the boy in the car.