The gunman who killed 27 people and himself in Newtown, Connecticut, was buried at a private service over the weekend, a spokesman for his father said.
Peter Lanza claimed the body of his 20-year-old son Adam, the spokesman added.
Connecticut's chief medical examiner released Lanza's body on December 27.
The day after the second-deadliest school shooting in US history, Peter Lanza said in a statement: "Like so many of you, we are saddened, but struggling to make sense of what has transpired."
Update: Reuters have issued a correction on this story. Adam Lanza's body has been collected but not buried.
More top news
A judge who was reunited with an old school friend standing before her in the dock encountered another familiar face in her court room.
Campaign backed for u-18s' right to delete damaging or embarrassing social media posts that could cause problems later in work or education.
An American hunter reportedly paid £32,000 to shoot Zimbabwe lion Cecil, a 13-year-old star tourist attraction who enjoyed human contact.