(CHARLOTTE) -- Law enforcement officials are seeking the public’s assistance in identifying a serial bank robber who has allegedly robbed at least nine banks in the western and southern United States since June of 2012, Including one in Winston-Salem.

During each robbery linked to the this subject, a lone male suspect enters the bank, approaches the victim teller and has been known to present a demand note. The suspect has also been known to carry a black, zippered portfolio.

He is normally seen wearing jeans and a blue polo shirt or blue t-shirt. The suspect also has a mustache and wears glasses.

At the robberies in Winston-Salem, North Carolina, and Bloomington, Illinois, the subject was seen with a black compact SUV,

possibly a Chevrolet Captiva or similar model, with a silver rack on the roof.

The last robbery occurred in O'Fallon, Missouri, on August 30, 2012.