The Waldo County Sheriff's Office is investigating a possible sexual assault in which the alleged victim says a man blew powder in her face, causing her to become unconscious.

The woman reported the alleged crime on Oct. 1, and said it occurred while she was working alone at her business in Lincolnville.

She told deputies she believes she was sexually assaulted while she was unconscious.

Detectives from the sheriff's office have been investigating the report with assistance from the Maine Drug Enforcement Agency and Maine State Police.

A composite sketch of the man was released Thursday. He is described as possibly being in his 50s, 5'8" to 5'10" tall and weighing more than 200 pounds.

Anyone with information on the man is asked to call Detective Dale Brown of the Waldo County Sheriff’s Office at 338-2040.