Per the article: "The FDLE investigator claims he determined through his "investigative resources" that an Internet Protocol, or IP, address associated with Jones's Comcast account was the source of the ESF-8 text message."
Comcast has this weird system that allows users to open their WiFi AP to other Comcast customers, in return for the ability to hop on to any other "open" Comcast AP.
AFAIK, Comcast made it opt-out.
So, someone could have driven by to use her AP specifically in order to implicate her.
I have multiple VLANs at home, and I only have one WAN IP.
for what its worth: claims to have tested and says they are different public IPs