In 1993, police in Coolbaugh, Pennsylvania were baffled when teacher Joanne Chambers received multiple death threats and questionable packages. Chambers reported every incident to the police, who in turn found a resemblance in the letters to statements that a fellow teacher, Paula Nawrocki, had made. However, the police were unable to find evidence directly linking Nawrocki to the threats. Regardless, Nawrocki was arrested and charged with harassment. Nawrocki's defense team sent the threatening letters and envelopes to be tested for DNA. The lab was able to determine that the saliva found on the stamp and envelope did not match Paula, but rather it matched Joanne Chambers. It was discovered that Chambers had previously made similar allegations at a different school.
