GRANT COUNTY, Wash. – The Grant County Sheriff’s Office is asking for the public’s help Tuesday in locating a woman they believe kidnapped a six-year-old girl from Moses Lake back in May.

Deputies said Shirley Jackson, 57, of Waterville, is believed to have taken Angel Jackson, 6, of Moses lake around May 13, 2016.

Jackson was a caregiver, but not legal guardian, of Angel. Deputies said despite them sharing the same last name, they are not related.

Officials said Jackson may have fled to her family in Oklahoma with the girl. They said her current whereabouts are unknown.

Grant County deputies along with the U.S. Marshals Service said they are concerned for Angel’s safety as Jackson is a convicted felon. They also said Jackson has a history of three confirmed Child Protective Services complaints but none of those complaints involved Angel.

Deputies said the people awarded custody of Angel in May have custody of one of her siblings. They had petitioned the court and had been awarded custody of Angel in May in order to keep Angel and her sibling together, deputies said. Angel has been listed as a missing person since this summer.

Jackson never had legal custody of Angel, deputies said. It is believed she fled the area with Angel in order to avoid having to obey the order of the court and bring Angel to her legal guardians.

Angel Jackson missing since May 2016, Grant County deputies are searching for her with help from the U.S. Marshals service

A warrant for first degree kidnapping has been issued for Jackson. Anyone with information is asked to call the Grant County Sheriff’s Office at 509-762-1160 or e-mail them at Tipsters can remain anonymous.