Attorneys for Richard Allen are appealing his conviction and 130-sentence for the murders of Abby Williams and Libby German.

Ashley Van Hemert tells "20/20" about the fateful 2018 night her roommate's estranged husband barged into their home, killed ...

The death of a woman who was partially paralyzed in the Columbine High School shooting has been ruled a homicide, raising the ...

In video never before seen outside the courtroom, a man purported to be convicted murderer Richard Allen is seen approaching ...

A new law in South Dakota prohibiting the use of eminent domain to acquire land for carbon capture pipelines challenges the ...