IL State Trooper common mistakes
IL State Trooper · Understand the traps and how to avoid them.
Reading the scenario stem once, jumping to the answer choices, and then hunting for a phrase that matches a choice instead of deriving the answer from the passage.
Time pressure on timed reading sections pushes candidates toward keyword matching, and answer choices are deliberately written to echo words from the passage while changing the logic (reversing cause and effect, swapping who did what).
What to do instead
Read the stem first to know what is being asked, read the passage actively (mark who, what, when, and the contrast word), then answer from memory of the passage before looking at the choices. Eliminate any choice that is true in the passage but does not answer the specific question asked.
Choosing the answer that is grammatically correct in isolation rather than the one that fixes the actual error, or 'correcting' a sentence that needs no correction.
Candidates spot one suspicious word and stop analyzing, and they distrust the 'no change' option because it feels like a trap. Test writers exploit this by making the original sentence correct while offering plausible-sounding rewrites.
What to do instead
Check the sentence against a fixed checklist in order: subject-verb agreement, pronoun reference, tense consistency, modifier placement, parallelism, punctuation. If every element passes, select the no-change option. Never pick a rewrite that introduces a new error such as a comma splice.
Answering vocabulary items by picking the option that merely sounds formal or official, or the one that shares a root with the prompt word, without checking whether the meaning fits the sentence.
Police reports reward formal register, so candidates over-select words like 'utilize', 'ascertain', or 'facilitate' even when the plain word is required, and root-similarity feels like a safe signal.
What to do instead
Substitute each candidate word back into the sentence and read it aloud. Eliminate any option that changes the sentence's meaning or register inappropriately. For spelling, sound the word out by syllable and check commonly confused pairs (affect/effect, then/than, loose/lose, stationary/stationery).
Setting up the arithmetic correctly but losing the answer to unit mismatches, order of operations, or failing to convert minutes to hours and similar shifts.
Word problems bury the units in prose, and candidates compute with the numbers in the order they appear rather than the order the operations require.
What to do instead
Before computing, write the units next to each number and circle the unit the question asks for. Do the calculation twice by different routes (estimation first, then exact), and check that the answer's magnitude is plausible. Use the answer choices to catch decimal-point and conversion errors.
Treating a logic item as a memory test and guessing, or drawing only the first diagram that comes to mind instead of testing every stated condition against it.
Logic questions look like reading comprehension, so candidates answer from impression. Under time pressure they stop after finding one arrangement that works instead of verifying it is the only one.
What to do instead
Translate each condition into a short symbolic rule, build a grid or ordering diagram, and test each answer choice by attempting to construct a counterexample. A choice is only correct if no valid arrangement contradicts it; eliminate choices one condition at a time.
Describing what the scene means or what probably happened instead of reporting only the observable details, and omitting quantifiable facts like direction, distance, clothing, and sequence.
The brain automatically fills gaps with inference, and candidates assume the reader shares their context. Stress and the desire to sound competent push toward conclusions rather than observations.
What to do instead
Practice the discipline of separating observation from inference: write 'the driver's eyes were bloodshot and his speech was slurred' rather than 'the driver was intoxicated'. Use a fixed observation checklist (people, clothing, vehicles, positions, actions, sequence) and record details in the order they occurred.
Answering situational judgment items by choosing the most aggressive or most lenient option, or by selecting the response that would be ideal in a perfect world rather than the one that is procedurally correct and proportionate.
Candidates either overcorrect toward toughness to show authority or overcorrect toward niceness to show empathy, and they ignore the department policy, supervisor, and documentation dimensions embedded in the scenario.
What to do instead
Rank options on three axes: safety of the public and the officer, adherence to policy and chain of command, and proportionality of the response. The best answer usually resolves the immediate safety issue, follows procedure, and documents the action. Reject options that escalate unnecessarily or that ignore a policy requirement.
In interpersonal scenarios, choosing to handle a conflict alone to avoid looking weak, or siding with a coworker out of loyalty when the coworker is wrong.
Loyalty to peers and fear of appearing unable to manage conflict are strong instincts, and candidates underestimate how much these items reward escalation through proper channels and honest reporting.
What to do instead
Default to direct, respectful communication first, then documented escalation to a supervisor when the issue persists or involves misconduct. Choose the option that protects the integrity of the investigation and the agency over the comfort of a colleague, and never choose concealment.
Writing report-style answers in passive voice with vague subjects ('a verbal altercation occurred', 'contact was made'), burying who did what to whom.
Academic writing training rewards impersonal, passive prose, and passive constructions feel objective and professional when they actually obscure accountability.
What to do instead
Write in active voice with a named subject for every sentence: 'Officer Reyes observed...', 'The suspect struck...'. Put events in chronological order with times, use plain words over jargon, and end with the disposition and evidence collected. Read the report back asking whether a reader who was not present could reconstruct the event.
Training only the tested events (running, push-ups, sit-ups) and neglecting the specific pacing, rest intervals, and order of events on test day, then arriving undertrained for the sequence or the recovery demands.
Candidates prepare each event in isolation at comfortable intervals, so cumulative fatigue across a timed battery is unfamiliar, and they may not know the exact standards, order, or rest periods their agency uses.
What to do instead
Confirm the exact events, order, rest periods, and passing standards from the official recruiting materials, then rehearse the full battery in that order at least twice before test day. Train progressive overload with rest intervals that match the test, and taper the final week rather than cramming.