Police were baffled when teacher Joanne Chambers received mass death threats and questionable packages. Chambers reported every incident to the police, who in turn found a resemblance in the letters to statements a fellow teacher, Paula Nawrocki, would say. However, the police were unable to supply information directly leading Nawrocki to the threats. Nawrocki's defence sent the 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's but rather matched Joanne Chambers. It was then determined that Chambers was framing Nawrocki because she disliked the teacher and wanted her out of the school.