The defense for Richard Allen, accused of killing teenagers Abby Williams and Libby German in Delphi, Indiana, said the group had a motive, because one of the girls' parents was dating a person of another race.
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The defense team described the murders as part of a "ritualistic sacrifice."
Attorneys also requested that Allen be immediately transferred from the facility where he's being held. They said members of the white nationalist group work there, and are threatening his life.
There was no immediate response from the judge or the prosecution.