Detectives discovered Maddy Middleton's body July 27 inside a recycling bin. Police arrested her neighbor, 15-year-old AJ Gonzalez.
They say he lured her into his family's apartment, where he raped and killed her.
He will be tried as an adult.
A public memorial for Maddy Middleton will take place August 23 at 3 p.m. at the Kaiser Permanente Arena in Santa Cruz.
In the meantime, three GoFundMe pages have been set up to help family members. So far, more than $42,000 have been raised.
PHOTOS: Police make grim discovery in search for Santa Cruz girl
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