article_snippet: Investigators thought the trail had gone cold.
article_snippet: The package was later intercepted by FBI, prosecutors said in court Monday.
article_snippet: they had a lot of suspicion.
article_snippet: they've always had a lot of suspicion.
article_snippet: And that television show just added to suspicion.
article_snippet: FBI agents have also asked local authorities to examine cold cases in locations near where Durst lived over the past five decades, DeGuerin said.