AUGUSTA, Maine — The mother of the 3-year-old girl who went missing last week, prompting authorities to issue the first Amber Alert in Maine since 2009, has been charged in the case, Augusta Deputy Chief Jared Mills said Tuesday.

Police sought the public’s help in finding a couple they believed took Lenore Wilson on Oct. 4 from her home on Sewall Street, after Wilson’s mother, Karen Lea, 40, of Augusta, was taken to the hospital for what police described as a drug-related medical emergency.

Mills said that law enforcement began considering the child endangered after a woman identified as Fatima L. Gissentaner, 26, of Augusta told officials that she had the child and planned to turn her over to Augusta police.

When the child was not returned, “obviously there was some cause for concern,” Mills said. After the Amber Alert was issued, another person, who police are not identifying, brought the child to the Augusta police station.

Mills said Tuesday afternoon that detectives have charged Lea with endangering the welfare of a child. Once police complete their investigation, the case will be presented to the district attorney’s office to determine whether any other charges will be filed.