At more or less the same time that Mr. Kaplan grudgingly agreed to give his help , prosecutors in New York received a phone call from the Las Vegas office of the F.B.I. The agents in Nevada had , for several months , been listening to secret conversations recorded by a criminal informant on their payroll .
Nevada
Las Vegas
/location/location/contains
PERSON
Kaplan
LOCATION
New York
LOCATION
Las Vegas
LOCATION
Nevada