Thousands of people are expected to attend a memorial service Thursday afternoon for an 8-year-old Tracy girl who was found dead in a pond last week.

More than 2,000 mourners are expected to fill a high school gymnasium to pay tribute to Sandra Cantu, who was allegedly killed by a Sunday school teacher and mother of Sandra's playmate.

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Another 500 people are expected at an overflow room with video of the service and audio will also be piped to loudspeakers at the West High School football field, which seats 7,000 people.

Sandra's family held a private funeral service on Wednesday.

Sandra's body was found in a suitcase near an irrigation pond 10 days after she disappeared from the mobile home park where she lived in a death that has shocked and terrified residents in Tracy.