Once she compared the "Pointwise Mutual Information" shared between various pairs of words in various "corpuses" (that means 'groups of posts' such as from different forums or users'), Alice was able to hone in on a guy who was probably the killer. Edmund White, Cupertino shoe salesman, was apparently The Balloon Mask Killer. The statistical evidence Alice found was enough for judges to get a search warrant for his house and they found a secret room that matched the room from the video.
The only problem was that Edmund and Sally were nowhere to be found by the time they searched his house. The FBI started a national manhunt to try and find him and of course they put Alice in charge of the effort. Now she had to put her skills as a real FBI agent to the test without any fancy mathematics to help her. She worked round the clock talking to neighbors, witnesses, and people who had seen his car. Working with police all over the West Coast she tracked the Whites to vacation home deep in the forest outside a small town in central Washington. A town called... you guessed it... Sequoia Falls.
Edmund White and Sally White were both found guilty of several counts of murder. Sally White committed suicide in her cell shortly after the conviction. Edmund is still on death row awaiting execution. He and his wife have been the subject of two True Crime documentaries about the killings they did. The FBI now teaches the methods used to catch them "at the academy" and you can read more on their website.
Alice moved to Sequoia Falls to work on a new government project a few years later in 1993. She said she fell in love with the town while she was here. She is very secretive about her new life but she occasionally gives talks on criminology and statistics to local schools, police departments, and universities. She lives with her cat Quixote and performs jazz music in her free time.