From People v. Nichols, decided Tuesday by Justice Mark Clarke, joined by Justices John Barberis and Barry Vaughan:
[The] charges [in this case] were predicated on photographs and videos of the defendant's minor daughters taken between 2002 and 2016 and were found on a computer and an external hard drive in the defendant's home. The defendant's husband, Douglas Nichols, who is not a party to this appeal [but who reportedly has filed his own appeal -EV], was also charged … with possession of the same images and videos.
Some backstory on how the images were found, from a March article in the Decator Herald & Review (Tony Reid):