Further investigation reveals that J. Clarence was considered by his friends and family to be a good man, with simple pleasures and honest feelings for Lisbeth, making him unlikely to have cheated on her.
With Cook safely in custody, Dallas and Peabody are called to see a man named Ratso, who tells them he has good information to sell.
Fixer was, as his name suggests, a skilled mechanic of underworld gadgets, and had apparently told Ratso that he had a good assignment, building bombs for an unknown group of people.
Later, Dallas and Roarke attend the reading of JC Branson's will, but little to nothing is gained however, as all the significant beneficiaries already had money, leaving them without motive for the murder.
The disc is from a group calling themselves Cassandra, named after the seeress of Greek legend, and claiming they will "bring punishment to the city", and promising to give a demonstration of their power at 9:15 that morning.
Peabody, having hooked up with an electronics detective named McNab (with whom she has a long-standing antagonistic relationship and with whom she ends up moving in together later in the series), gets a call from Zeke who admits everything.
When Eve goes to delivery the extortion money demanded by Cassandra (and hopefully lay a trap for them) a similar blast takes place at the railway station serving as the drop point.
It is also revealed that Zeke never killed Mr. Branson, but rather a droid copy, and the entire thing was staged in an attempt to keep Eve distracted from the Cassandra case.
As the book was written in 1999, the author had no way of knowing that the Towers would be destroyed in a terrorist attack a couple of years later and, as such, would not be standing in 2060.