A new Illinois law makes it a felony for parents to stay silent if a child dies or disappears.

The law was inspired by the case of 2-year-old Caylee Anthony in Florida. She was missing for a month before her grandmother contacted police.

Caylee's mother, Casey Anthony, was charged with the girl's murder but was acquitted.

Gov. Pat Quinn signed the Illinois law Friday. It says parents or legal guardians must report a death or disappearance within 24 hours if the child is under 13. The time limit is reduced to one hour for children under 2.

It takes effect immediately.