PORTLAND — The trial of a Hebron man charged with being a felon with firearms got underway Tuesday in U.S. District Court.

Dario Giambro, 74, faces up to 10 years in prison and a fine of up to $250,000, if convicted.

Giambro is prohibited from having guns stemming from a 2007 federal conviction from a jury trial for having an unregistered firearm among the more than 200 guns in his possession when he lived in Auburn.

A jury heard Tuesday morning from authorities who from Jan. 26-28, 2022, were at the mobile home where Giambro lived at 692 Paris Hill Road in Hebron. They had executed a search warrant for guns and related items.

They seized more than 1,000 items, including 16 guns, Maine State Police Detective Desiree Hurd testified.

Among the guns were four 12-gauge shotguns, five rifles (some semi-automatic,) five semi-automatic pistols, and two revolvers, prosecutors said.

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Hurd said the guns were found throughout Giambro’s home, including leaning against walls and lying on a bed. Some were in boxes, some in cases and crates.

Investigators also recovered boxes of ammunition, she said.

All 16 guns seized by authorities had been tagged and marked as evidence.

Assistant U.S. Attorney Nicholas Heimbach walked the investigators through each gun, showing it to the jury and describing its chain of custody.

The seized guns were taken to a secured room at the Maine State Police barracks in Gray where they were kept for processing, Hurd said.

Defense attorney Edward MacColl quizzed her about whether the guns had been checked for DNA and whether any of them had been fired recently.

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She said they hadn’t been loaded with ammunition and confirmed she hadn’t seen Giambro at the scene during the search.

Prosecutors had said Giambro had been in possession of a Marble brand Game Getter rifle, a weapon with a combination of shotgun and rifle barrels more than 12 inches but less than 18 inches in length.

The unique guns were last made in the early 1900s.

The weapon was not registered to Giambro in the National Firearms Registration and Transfer Record as required by federal law.

Giambro’s home was searched after a shooting there earlier in the day on Feb. 10, 2006.

In the courtroom Tuesday, Giambro wore a gray, hooded sweatshirt and a blue surgical mask over his long white beard.

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