AUBURN – The prosecution on Tuesday presented evidence – including surveillance video and cloth fibers – linking Richard Dwyer to Donna Paradis’ body and the clothes and digging tools found near her shallow grave.

Dwyer, 45, of Canton, is accused of raping, robbing and strangling Paradis in October 2007. The two worked at Affiliated Computer Services on Lisbon Street in Lewiston.

Paradis, 38, and seven-and-a-half months pregnant, was last seen on Oct. 23, 2007, when she left ACS and went to a local Northeast Bank to get $400, the amount Dwyer had told her she’d need to buy a car.

Paradis’ body was discovered about three weeks later, on Nov. 12, in a wooded area behind the Promenade Mall on Lisbon Street. She was found naked, red strips of material looped and knotted around her wrists and neck. A pickax, shovel and clothing – including maternity pants that were smudged with dirt and turned inside out – were found nearby. Paradis had been buried under dirt and large chunks of concrete that were so heavy it took two police officers to move some of them, a Lewiston police detective testified Tuesday.

Such concrete pieces are common in the area where the body was found. Police believe they were likely dumped there at some point by a local concrete manufacturer.

On Tuesday, Assistant Attorney General Lisa Marchese showed security camera footage of a man buying a pickax at Wal-Mart in Auburn and buying a shovel and a yellow flashlight at Lowe’s in Auburn on the evening that Paradis disappeared. The man matched Dwyer’s physical description and was wearing a maroon flannel shirt like the one Dwyer had been seen wearing at work that day.

At Lowe’s, the man paid for the shovel and flashlight with a $100 bill. Paradis had withdrawn four $100 bills from Northeast Bank.

Dwyer’s former girlfriend, Brenda Hamel, testified that Dwyer brought a yellow flashlight with him when he visited her at her new apartment in Lewiston that night.

“I had never seen it before,” she said.

Also linking Dwyer to the scene: cloth fibers found on the strips knotted around Paradis’ wrists and neck, on the maternity pants and under the UPC code sticker of the pickax. A state forensic chemist testified the fibers were the same color and material as a maroon flannel shirt seized from Dwyer’s home.

Dwyer’s lawyer, George Hess, noted that the concrete that covered Paradis was so heavy it required two people to move. No one but Dwyer has been accused of Paradis’ murder.

And Hamel, Dwyer’s former girlfriend, testified that she took a shower with Dwyer and slept with him the night Paradis disappeared, but she didn’t see any scratches or other marks on his body.

The trial resumes Wednesday. Dwyer is being held without bail at the Androscoggin County Jail.