SALEM – A Peabody construction worker who admitted participating in the $600 knife-point robbery of a 67-year-old man at his Bresnahan Court home in Peabody nearly two years ago received three years of probation.Michael L. Randazzo, 34, formerly of 20 Dalton Court, Peabody, was about to go on trial, but instead opted to plead guilty to a charge of armed robbery Tuesday in Salem Superior Court before Judge David A. Lowy.The judge went along with the recommendation offered by Assistant District Attorney Michael Patten and defense lawyer David Grimaldi, but not without recognizing that the state had to take into account its case and prove it without a reasonable doubt.Patten stated the charge concerns an incident on Feb. 8, 2008, when Randazzo, who was a neighbor of the victim, and two other unidentified accomplices walked into the elderly man’s home at 20 Bresnahan Court. at around 2:15 p.m.The then 67-year-old victim was wearing shorts at the time. One of the robbers grabbed a knife, slashed the elderly victim’s shorts and grabbed the $600 in cash and the three fled, said Patten.The victim later identified Randazzo as one of the assailants.Patten said he would have proceeded at trial on a joint theory position while pointing out that the DNA profile ran on the knife was not Randazzo’s profile.Patten said the victim, now age 70, is in extremely poor health and it would be an issue at trial and an “extreme hardship” getting him out the door to the courthouse to testify.Patten emphasized that he had to take the victim’s health into consideration, that the victim wanted to resolve the case and not testify and was aware of the probationary term being offered.Grimaldi said his client has three children, is a construction worker and is “fully prepared to turn his life around,” as he urged the judge to adopt the proposed recommendation, saying “it is a fair disposition.”