The interpretative phenomenological research approach is used in this study to determine the lived experiences of the ten (10) police investigator – participants in testifying before the Regional Trial Court (RTC) from the different police stations at the 4th District of Laguna. The participants of this study were selected using a purposive sampling technique. In gathering the data, the researchers conducted a face-to-face interview employing unstructured interview guide to document the lived experiences, problems encountered and solutions applied by the police investigator – participants in testifying before the RTC. The data were analyzed based on Lichtman’s (2013) three C’s of analysis, from Coding to Categorizing to Concepts. The study revealed that the 10 participants experience nervousness in testifying, especially for testifying for a first time. They usually experienced the same problems as they handled a lot of works that leads to the anxiety experienced by the participants in the preparation of the case as they are not having enough sleep and rest before going to a witness stand. The findings of the study imply that the police investigators need to have a refresher training course in the preparation and in testifying inside the Courtroom.