Investigators say the suspect canceled the insurance policy on his pickup truck, which is believed to have been destroyed.
Marni Yang's petition for a new trial was denied, her attorney said.
The teen, formerly known only as Jane Clinton Doe, had been fatally shot in the head, and her death was ruled a homicide, the nonprofit said.
Without a job, Guadalupe Ceja Hernandez, who has spina bifida, says she has no health insurance and will now likely have to pay out of pocket for her medical treatments.
Surveillance video from the area near Ridgeland and Jackson appears to show someone with a ladder putting up one of the signs in the middle of the night.
A north suburban alderperson is facing charges after being accused of falsifying an election ballot by signing a mail-in ballot with her deceased mother's name.