The significance of the Lexington Sheriff's office search warrant execution?

On May 1, 2013, agents from the FBI and SLED
raided the Town of South Congaree offices.
Terminations and resignations followed. 

Rumors of crimes in Lexington County, related to video gaming devices, began surfacing in the the summer 2012.
Between last Thursday and Monday, a team from the U.S. Department of Justice and the Federal Bureau of Investigation executed a search warrant on the "Sheriff's Suite" at the Lexington County Sheriff's Department," on Gibson Road in Lexington.
Listed on the search warrant, among many potentially high-volume evidence items, is the "office computer" of Sheriff James Metts.
Is the timing of the raid significant?
The establishment of the search warrant began last Thursday (June 19) less than two days after Metts, with three others, was indicted on bribery-related charges. Metts was not implicated for anything to do with gaming.
The search warrant specifies that it (like almost any search warrant)  is issued because there is probable cause of obtaining  evidence of a crime, or evidence used in the committing of a crime.
With rumors of activity involving illegal gambling circulating for almost two years; where did the probable cause come from at this stage in the game?
It looks like the evidence seized is related to video gambling, whereas the June 17 indictment of Metts had to do with handling alleged illegal immigrants.
Besides Mett's office computer, the warrant executed Monday, lists evidence as: a memo entitled "Video Gaming, Sweepstakes, and Related Enterprises."
Did the arrests of last Thursday set "tongues to wagging?" Is someone, a high-profile, omniscient now talking for fear of the heavy foot of the law coming down?
Indicted with Metts was former South Congaree Police Chief Jason Amodio. He is charged with misconduct in office.
According to the indictment, Amodio took money from former Lexington Town Councilman Danny Frazier, who was indicted, too. Frazier, according the charges, received gaming machines from Amodio that had been seized by the police department.
So who is talking, and what specifically are they telling?
Monday's report of a raid just brings more speculation into the high-profile investigation, just as all the items seized do.
Another evidence item is a "white three-ringed binder containing information on properties being foreclosed on."  What could that be about?
Also on the list in the search warrant are: 2012 campaign notes, personal electronic devices, a laptop,  a vanilla folder, computers, briefcases, appointment books, folders and loose papers.

On the list, too, are six cassette tapes. in a large yellow envelope and cassette removed from a recorder, connected to a phone.

At this point, it is a guessing game, and certainly more intrigue is to come.