The Federal Bureau of Investigation announced on Monday the names of the 499th and 500th fugitives to the agency's Ten Most Wanted list.
The addition of Jose Manuel Garcia Guevara, aka "Pelón," an alleged murderer and rapist, and Walter Lee Williams, an alleged child sex predator, marked a milestone for the list, which was established 63 years ago.
"This has been a tremendously successful program, but one that is dependent on the willingness of concerned citizens with information to come forward and offer us their assistance," Criminal Investigative Division Assistant Director Ron Hosko said at a news conference,
Since its inception in March 1950, 469 fugitives have been apprehended or located, 155 of them as a result of citizen cooperation, according to the FBI.
The intent of the list has been to seek the help of the public and the media to catch some of the nation's worst offenders.
"The Top Ten program relies heavily on the help of citizens and the media," FBI Assistant Director of Public Affairs Mike Kortan said. "Without their help over the years, the FBI could not have located many of these individuals."
The FBI is offering a reward of up to $100,000 for information leading directly to the arrest of Guevara or Williams.