Jurors in the trial of John LaCoy heard opening statements and prosecution testimony on Wednesday. Lacoy, a resident of Winthrop, is charged with second-degree murder for the homicide of Casey Taylor, 36.. Lacoy allegedly stabbed Taylor to death in August 2011 and deposited his remains beneath the porch of his Winthrop Street home. The remains were discovered in an advanced stage of decomposition after a neighbor reported a strange odor to city agencies; Taylor’s identity was determined through the use of dental records. Assistant District Attorney Ursula Knight and defense Atty. John Tardiff appeared before Judge Raymond Brassard in courtroom 806 of Suffolk Superior Court.