Investigators may interview some persons.Logical formLearned from29 sentences. Investigators may emphasize that something-is-the-case.Logical formLearned from28 sentences. A study can be by investigators.Logical formLearned from28 sentences. Investigators may be hypothesised.Logical formLearned from28 sentences. Investigators may spend some months.Logical formLearned from28 sentences. Investigators may be overwhelmed.Logical formLearned from28 sentences. Frustration can be with stonewalling of investigators.Logical formLearned from28 sentences. Investigators may lose a trail.Logical formLearned from28 sentences. Investigator can be in a case.Logical formLearned from28 sentences. Investigators may ask a male.Logical formLearned from28 sentences. Investigators may reach conclusions.Logical formLearned from28 sentences. Investigators may write that something-is-the-case.Logical formLearned from28 sentences. Investigators may uncover a plot.Logical formLearned from28 sentences. Investigators may have some leads.Logical formLearned from28 sentences. A (task force) can be constituted-of-or-filled-with investigators.Logical formLearned from28 sentences.