Callahan has been convicted twice of murdering Micah Pollack back in 1997, but was granted two retrials because of improper jury instruction.
Today the Commonwealth called witnesses who worked on the criminal investigation of Andrew Callahan back in 1997 and 1998.
Jeffrey Lee, who assisted in searching the Callahan residence with the State Police during the investigation, testified that a 12 gauge shotgun was taken from that house, the same kind of gun that Andrew Pollack was shot with.
Lee also said that 12 gauge shotgun shells were found in Callahanís car.
Another piece if the puzzle that the Prosecution focused on today was the rope that was tied around Micah Pollockís ankles that they say was used to drag him down to the beaver pond where his body was found.
Expert witnesses testified that pieces of rope, constructed the same way and made out of the same fibers as the rope taken from around Pollackís ankles, were found tied to the car Callahan drove and was also being used at the Callahan residence as a clothesline.
Another expert witness, Jack Wall, examined the 12 gauge shotgun taken from the Callahan residence. He was a forensic firearm and tool mark examiner with the State Police at the time.
He testified that it would be very unlikely for that gun to accidentally fire.
Wall said the gun was in good working order, and he couldnít get the gun to discharge by dropping it or hitting it with other items while he was examining it.
He also said it would take at least five pounds of force to pull the trigger on that particular gun.
Other witnesses called today included two loggers who were working in the Pine Run area back on November 5, 1997. They said they saw Callahanís Ford Bronco parked outside the gate that led down to the beaver pond where Pollackís body was found. They also said they saw two people walking down the path into the woods.
The Prosecution is expected to wrap-up their case soon, after which the defense will begin. It is unknown if Andrew Callahan will take the stand.
Stay with WTAJ News for the latest updates on this trial.