( CNN ) -- A California Sunday-school teacher accused of killing a young girl may have abducted another child , police said . Melissa Huckaby is charged with killing 8-year-old Sandra Cantu , who was a friend of her own daughter . 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 . Watch Nancy Grace for details » . Police were called to the mobile home park after the girl 's mother reported her missing , according to KOVR . Police discovered that the girl was at a park with Huckaby . Huckaby said she had permission to take the girl , but the girl 's family disputed that claim . About five hours after the girl was returned to her family , they discovered that she was under the influence of the drug . `` Her speech was slurred . She could barely walk . She could barely stand , '' the girl 's older sister told KOVR . Police could not prove that Huckaby had drugged the girl and no arrest was made then . On April 11 , Huckaby was arrested and charged with killing and raping Sandra Cantu . Huckaby -- a Sunday-school teacher who lives in the same mobile home park as Sandra 's family -- has been charged with murder , kidnapping , the performance of a lewd and lascivious act on a child under 14 , and rape by instrument . If convicted , she would face the death penalty or life in prison without parole , authorities said .
NEW : Karen Huckaby named in police report on the missing girl case . Huckaby charged in slaying of year - old girl . She faces special circumstances including kidnap , rape by instrument . Decision on whether to seek the death penalty will come later .