When the body of Kathleen Newberry (the woman who was to testify against Kyle) is found dead in her car at the bottom of the everglades, the evidence takes Horatio back to Kyle's mom, Julia Winston.
After seeing her exploited on the website "Solve a crime with Calleigh" two young guys abduct her and force her to use her CSI expertise to cover up a murder they just committed after a poker game gone wrong.