EATONTOWN — Police have released a composite sketch of Louis Lema, prepared by the State Police, who is wanted for the sexual assault of a girl under the age of 13, who was left in his care. Lema, 18, an undocumented immigrant from Equador, is accused of sexually assaulting the girl, who is a relative Jan. 9. Police said Lema had been living with the victim’s family for about eight months but has not been seen since the alleged attack. Lema is a restaurant worker, and police suspect he is working in a kitchen of a restaurant in the Monmouth County area. They said he usually washes dishes. He also could be working as a day laborer, they said. Lema is described as 5 feet tall and 130 pounds, thin, with a light complexion and dark hair and eyes. Anyone with information about Lema is asked to contact Detective Daniel Guthrie or Detective Sgt. Thomas Clayton of the Eatontown police at (732) 389-7644 or (732) 542-0100.