WATERVILLE, Maine (WHDH) — The mother of missing Maine toddler Ayla Reynolds said she'll open up about evidence in her daughter's case.

Trista Reynolds said there's “horrific, physical evidence” she'll reveal online September 24th.

She’ll also hold a news conference the next day, when Ayla's father is due in court for an unrelated assault charge.

Investigators said her father, Justin Dipietro and several others know more than they're telling.

Ayla was 20 months old when she went missing from Waterville, Maine in December 2011.

Investigators believe she is dead.

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