Bend Police released a composite drawing Tuesday of a man they believeis responsible for four bank robberies between December 2011 and December 2012.

Bend Police describe him as a light-skinned, heavyset male between 5 feet 6 inches and 5 feet 10 inches tall. Both Bend Police and the FBI are on the case, which has been dormant since the last bank robbery on Dec. 27.

Joyce Nagy, forensic artist for the Clackamas County Sheriff’s Department, drew the picture in April after interviewing victims of the robberies. She said she uses a facial identification book that highlights certain features, changing features as the victims noticed something wrong about the sketch.

“You have to work how the brain works,” she said. “People aren’t able to tell you if something’s right or not, but they can tell you when something’s wrong.”

Bend Police spokesman Lt. Chris Carney said the photo authorities were working with, a screenshot from a video surveillance camera, showed the robber with a knit hat, sunglasses and cloth covering his face. The addition of the composite, Carney said, will significantly help the investigation.

“What we had before didn’t reveal enough to work off of,” Carney said. “But having a complete composite shows us what the suspect could look like. We’ll take every lead we can get.”

Carney said the bank robber was working on a vague pattern — approximately every four months he robbed a bank. In December 2011 and April 2012, he robbed the Bank of the Cascades branch on U.S. Highway 97 in south Bend. In July and December 2012 he robbed Home Federal Bank at Northwest Franklin Avenue and Northwest Bond Street in downtown Bend.

Because the robber has not struck in more than four months, detectives believe he is either hiding from authorities, living in another area or already incarcerated, Carney said.

“There are all kinds of things that we don’t know the answer to with this case,” Carney said.

Carney said the department is working to send the composite to correctional facilities and parole officers, who may run into the suspect.

Although the drawing was completed April 15, according to Nagy’s signature on the composite, Carney said Bend Police failed to distribute the image earlier because investigators were following other leads and other investigations had taken precedence.

The reward offered by the Bank of the Cascades still stands at $5,000 for information leading to the arrest of the suspect.

“Our fingers are crossed that we get someone who recognizes him,” Carney said. “I would say that most people get caught, it’s just a matter of how long it takes.”