NEW: A California man is pleading guilty to harassing Nancy Guthrie's family. Derrick ...

Theory Briefing

• Derrick Callella pleaded guilty to two counts of harassment, directing that conduct at the family of Nancy Guthrie.
• The case shows how online true-crime communities can fuel real-world targeting of victims' relatives, not just suspects.
• A guilty plea — rather than a trial — suggests the evidence of the harassment campaign was clear-cut and documented.