49-year-old Peter Robinson of Bradford is accused of murdering 71-year-old David Trask of Hudson.Robinson claims it was self-defense.The first day of testimony in the trial was Monday.Listening to opening statements by the prosecution and defense, with allegations of threats and property disputes, it sounded like a modern day version of the Hatfields and McCoys. “Once Mr. Robinson began to purchase these parcels of land during the last 10 or 12 years,” said Assistant Attorney General Andrew Benson. “He decided he didn’t want to have anyone else down in there around him bothering him and that became a problem.”"They had to leave their homestead, because they had been driven off their land by a band of bullies,” said Robinson’s defense attorney Thomas Hallett. “You don’t want to hear that you don’t want to think that’s true the state of Maine, you don’t want to think that’s true anywhere, but it happens.”In November of 2011, the disagreements turned to violence.The feud between the two families dates back a couple of years, and the attorneys on both sides said the other family was the aggressor.”He said something along the lines of Carl, (David Trask’s brother) the war icon D-Day is coming are you ready for D-Day? Well D-Day was coming”, said Benson.While Hallett pained a different picture. “Thunderously he yelled at him, rage in his eyes, We will do whatever it takes to get rid of you Mr. Robinson.”Both sides agree Robinson killed Trask by hitting him with a crow bar, But they disagree on the events that transpired beforehand, including Robinson’s mindset.”The evidence is he had a black holster on his belt,” said Hallett during his opening statements. “And that he had knives in his pocket and he took off his glove, and Pete saw him reach to his right side and Pete hit him again, because Pete thought head a gun.”"He caused the death of David Trask and he did so either intentionally or knowingly or under circumstances manifested by a depraved indifference to human life,” declared Benson near the end of his opening remarks. “And he is thus guilty of murder.”Police officers and paramedics were the first witnesses called in the trial, which is expected to last at least through the week.