An American teenager from Alabama faces charges of killing his mother and two younger brothers with a knife, before leaving home to go to school as if nothing had happened.
The bodies of 36-year-old Holly Durham, Branson and 13-year-old Baron Durham, were found late on Tuesday in Monford, Alabama.
The accused teenager, Landon Durham, was driving his car Wednesday morning when he was arrested, as he was charged as an adult with the crime of murder and was due to appear in court on Friday.
Taladega County attorney said he did not know the motive for the crime.
The mother and the twin are believed to have been stabbed to death at about 3 am on Tuesday.
The lawyer stated that the suspect attended classes later that day at the Monford School.
The bodies were found by two family members.