Updated

Two bookmakers are expected to testify in court about how James "Whitey" Bulger allegedly forced them to pay him so they could stay in business.

The bookies are slated to take the witness stand Friday in Bulger's racketeering trial.

On Thursday, jurors were shown a collection of weapons — including six machine guns — that prosecutors say Bulger and his gang used to intimidate people and extort money.

A retired state police colonel testified that Bulger's gang collected fees known as "rent" from bookmakers, drug dealers and others to allow them to operate within their territory.

Bulger, the former leader of the Winter Hill Gang, is charged with participating in 19 killings in the 1970s and '80s.