(CNN) -- A California Sunday-school teacher accused of killing a young girl may have abducted another child, police said. Melissa Huckaby, 28, was arrested earlier this month and charged with killing and raping 8-year-old Sandra Cantu, who was taken from a mobile home park in Tracy, California. Police said Huckaby was named in a January police report about the four-hour disappearance of a 7-year-old girl from the same mobile home park, CNN affiliate KOVR reported. After Huckaby returned the girl, the girl had to be taken to a hospital because she was under the influence of a strong muscle relaxant....