The FT is reporting a move by the US Department of Justice, representatives of which have been in the UK, to offer immunity to junior traders in an attempt to glean information about their senior staff

US prosecutors are offering immunity deals to junior traders in London as they try to gather evidence against banks and more senior staff in the investigation into alleged currency market manipulation

US Department of Justice staff have flown to the UK in recent weeks to interview foreign exchange traders, who have been offered partial immunity in exchange for volunteering information about superiors, people familiar with the situation said

One senior lawyer said the DoJ probe was well-advanced. The DoJ declined to comment. Referring to general criminal activity, Leslie Caldwell, its criminal division chief since May, told the FT last week that the authority would be “appropriately aggressive” and seek to bring “timely” cases against financial institutions.

The article concludes, however, that

another lawyer said that while the DoJ had offered immunity deals to a number of traders, most had so far declined as they did not have “killer evidence” to trade against leniency

Read more here ( possibly gated but available on a free subscription)

The witch hunt continues