SALEM – The defense lawyer in the double murder trial of Peter S. Ronchi, the Marblehead massage therapist charged with stabbing his pregnant girlfriend in her Salem Apartment in 2009, wants the confession his client made to police thrown out of the trial, claiming it was not voluntary and that his client has no recollection of being read his Miranda rights.Defense lawyer David J. Nathanson appeared Wednesday in Salem Superior Court, filing several preliminary trial motions before Judge Timothy Q. Feeley.The judge set a hearing on the preliminary trial issues debated on Jan. 21In particular, the defense is questioning the legality of the statement Ronchi made to Connecticut and Massachusetts police officers on May 17, 2009.Ronchi, 47, last known address of 10 Taft St., Marblehead, stands charged with two counts of murder in the first degree in connection with the May 16, 2009 stabbing death of his 42-year-old pregnant girlfriend, Yulya Galperina, and her unborn son.Assistant District Attorney Jean M. Curran believes that Ronchi arrived at Galperina’s apartment complex on Pope Street in Salem around 10:30 p.m. and left about an hour or so later. The apartment video shows him arriving and leaving.Prosecutors believe Ronchi brought a six-inch hunting knife with him to the apartment and stabbed her multiple times in the back and side, leaving her to bleed to death.Then after apparently washing his hands and changing clothes, Ronchi fled to Connecticut, where he turned himself in to police, telling them he had killed his girlfriend because “she told me I wasn’t the father of the child she was carrying, I lost it. I stabbed her,” police reports say.Ronchi and Galperina had a two-year relationship.Nathanson states in the motion to suppress the confession that his client was in an emotional state and had not slept for 24 hours.He maintains Ronchi’s amendments rights were violated because he has no recollection of anyone reading him his Miranda rights when he was being interrogated and that Ronchi has no recollection of even being informed that he had a right to use the telephone.Both of the first-degree murder charges carry a mandatory punishment of life behind bars without ever being paroled.