Bittersweet video shows Maleah Davis smiling before disappearance

HOUSTON -- New images show missing 4-year-old Maleah Davis smiling after brain surgery, just weeks before she vanished.

Maleah's mother shared video of her daughter with KTRK-TV.

The video shows nurses wheeling Maleah to her hospital room after undergoing surgery in March.

She cracks a smile while holding a rainbow balloon, and the room erupts in cheers.

Maleah vanished in early May.

Her mother's former fiancé, Derion Vence, has been charged with evidence tampering in the case.

A total of $20,000 in rewards have been offered for information leading police to her location or a conviction in the case.