There's a plaque, explaining that he was the local Congressman from 1972-1978.

Suddenly I knew who he was. It's strange, though; i'd always associated him with San Francisco.

[Leo J Ryan was a US Congressman who, upon hearing reports of human rights abuses by a cult which had relocated to Guyana from San Francisco, flew to Guyana to investigate. Members of the cult killed him and many of his entourage, and then the entire cult --- except those few who escaped --- killed themselves by drinking drug-laced kool-aid.]