Published: Aug 16, 2010 4:39 PM EDT
Updated: Aug 16, 2010 1:39 PM EDT

MARGATE, Fla. (AP) - The owner of the daycare center where a 2-year-old girl died after she was left in a hot van says it was a horrible mistake, but her entire staff shouldn't be blamed.

Kathryn Muhammad says the employee who left Haile Brockington in the van was fired and that all four day care centers she owns will change their transportation procedures.

Muhammed says her employees have been called "baby killers" and have had food and other items thrown at their cars since Haile's death on August 5.

Muhammed was cited two years earlier after an 8-year old fell asleep and was left in a van at another school they own.

The Department of Children and Families is investigating the center.