MONROE (WWJ) – Authorities are looking for tips in the case of a 22-year-old Monroe County woman who has been missing since last weekend.

Chelsea Bruck of Maybee, Michigan, was last seen at a Saturday night Halloween party with more than 500 people at a home in French Town Township.

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Monroe County Sheriff’s Captain Brett Ortolano said they’ve been using all available resources they have in searching for Bruck.

“We’ve got some off-road vehicles, we have an Argo and we have an ATV, both, that officers are using in the field in addition to the vehicles, being on foot,” Ortolano told WWJ Newsradio 950. “We’ve deployed K-9s in the area, and the Sheriff’s Office helicopter was up, looking from the air.”

As a result of media coverage, Sheriff’s officials said a witness came forward describing how he saw Bruck at approximately 3 a.m. Sunday with an unknown white male. This unknown male had a medium build, medium-length dark hair, a thin mustache, and other facial hair. He was wearing a plain black hooded sweatshirt with no visible logo and black framed glasses.  A sketch (below) was drawn up of the man.

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Bruck is a white female with blond hair, around 5 feet, 7 inches tall and 140 lbs. with a small tattoo of an anchor behind her right ear. She was last seen wearing a “Poison Ivy” Batman character costume, which consisted of black tight-fitting yoga pants or leggings, a green ivy leaf-covered top, and a long, dark purple wig.

According to the witness, Bruck and the unknown man were seen walking toward cars were parked outside the party. It’s still unknown whether she got into a vehicle and drove off with the man.

A compoiste image of a man who may have been seen with Chelsea Bruck. (credit: Monroe County Sheriff's Office)

A composite image of a man who may have been seen with Chelsea Bruck. (credit: Monroe County Sheriff’s Office)

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Ortolano said investigators want to speak with anyone who was at the party who may have seen Bruck or who might recognize the unknown man. Anyone who has seen Bruck, the man in the composite image, or who has any information about this case is urged to call  the Monroe County Sheriff’s Office at 734-240-7700 or Monroe County Central Dispatch at 734-243-7070.