The 12 jurors have been picked in the murder trial of a New Hampshire man prosecutors say raped and killed a 19-year-old college student whom his former girlfriend lured to their apartment.
  
Authorities say 31-year-old Seth Mazzaglia of Dover strangled University of New Hampshire sophomore Elizabeth “Lizzi” Marriott Oct. 9, 2012, at the Dover apartment he shared with his then-girlfriend, Kathryn McDonough.
  
Juror No. 12 was chosen Tuesday. Four alternates also will be picked.
  
Prospective jurors were warned at the start of jury selection in Strafford County Superior Court last week they are likely to hear graphic testimony about sex acts.
  
Prosecutors say Mazzaglia and McDonough dumped her body into the Piscataqua River off Portsmouth’s Peirce Island. It hasn’t been found.
  
Mazzaglia has pleaded not guilty.

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