PCMG Delegado de Polícia common mistakes
PCMG Delegado de Polícia · Understand the traps and how to avoid them.
On Portuguese Language items, the candidate answers by ear, choosing the option that 'sounds right' instead of testing the sentence against the standard-norm rule being examined (crase, regência, concordância, colocação pronominal).
Brazilian Portuguese everyday speech diverges sharply from the written standard the exam requires, and the candidate has rarely had to justify a choice with an explicit grammatical rule, so intuition substitutes for analysis.
What to do instead
For every language item, name the rule before reading the options: write the syntactic structure (verb plus its complement, preposition required or not), then eliminate options that violate it. Build a one-page rule sheet for crase, regência of the ten most-tested verbs, and pronoun placement, and re-derive each rule from an example rather than memorising the label.
The candidate treats Criminal Law questions as recall of article numbers and answers from the statute's wording without checking whether the concrete case fits the type's objective and subjective elements, or whether a cause of exclusion, error, or concurrence applies.
Heavy volume of statutory text encourages memorisation of numbers, and the candidate conflates 'the article exists' with 'the conduct subsists as a crime in this fact pattern'.
What to do instead
Answer in a fixed sequence: identify the protected legal interest, test each element of the type against the facts, then run exclusion causes (legitimate defence, necessity, inexigibilidade), then error of type or prohibition, then concurrence of crimes or concurrence of norms. Practise by writing the sequence out for ten fact patterns before looking at the options.
In Criminal Procedure Law, the candidate confuses the phases and the actors: mixing up who may order what (delegado, Ministério Público, judge), which measures require judicial authorisation, and the difference between flagrante, preventiva, and temporária, answering from a vague memory of 'the police can do it'.
The subject is procedural and sequential, but candidates study it as isolated articles, so competence and prerequisites blur together and the answer follows whichever actor the question mentions.
What to do instead
Build a matrix with measures as rows and columns for legal basis, who requests, who decides, maximum duration, and remedy. Reconstruct the flow of an investigation from notitia criminis to denúncia on paper, marking each decision point and who holds it. Test yourself by covering the columns and reproducing them.
On Constitutional Law and Human Rights, the candidate answers from personal conviction about what is fair or from news coverage of a single court decision, instead of applying the constitutional text, the proportionality test, and settled jurisprudence on fundamental-rights restrictions.
Human rights topics invite moral reasoning, and the candidate substitutes opinion for doctrine, especially on collision of rights, federal competence, and the limits of police action.
What to do instead
For every restriction-of-rights question, apply the three-step proportionality analysis explicitly (adequacy, necessity, proportionality in the strict sense) and state which constitutional provision anchors the answer. Keep a short list of settled positions on police powers and rights (inviolability of domicile, communications, assembly, use of force) and verify each against the constitutional text and jurisprudence before answering.
In Administrative Law, the candidate conflates the regimes of administrative acts, contracts, and disciplinary liability, mixing up which defects produce nullity versus annulability, which sanctions the delegado may apply, and which principles govern each, answering from the general idea that 'the administration can always revise its own acts'.
The subject spans several statutes with overlapping vocabulary (poder de polícia, auto de infração, sindicância, processo administrativo disciplinar), and candidates learn the labels without mapping them to distinct legal regimes.
What to do instead
Create a comparison table of the regimes with columns for legal basis, competent authority, required procedure, effects, and judicial review. For each principle, write one concrete example and one counterexample. When answering, identify which regime the facts invoke before evaluating legality.
In Civil Law and Business Law, the candidate answers from general notions of fairness or from contract intuition without locating the applicable rule in the Civil Code or the corporate statute, and without distinguishing nullity from annulability, obligation from liability, or the several types of business entity.
Civil and business law are perceived as 'common sense' subjects, so candidates skip the systematic study of legal facts, defects of consent, and the different regimes of obligations and companies.
What to do instead
Study by legal fact and by effect: for each transaction, identify the requirement, the defect, the consequence (nullity, annulability, ineffectiveness), and the remedy. Build a table of business entities with liability of partners, capital rules, and decision-making bodies, and practise classifying short fact patterns into the correct entity and liability regime.
In Criminology and Criminal Investigation, the candidate answers from the plot of a famous case or from popular assumptions about criminal behaviour, rather than from the theory, method, or investigative technique the item is testing, and confuses the roles of the investigating officer and the expert.
The domain is taught with narratives and case stories, which are memorable but do not map to the analytic categories the exam uses, and the boundary between investigation and expert examination is often blurred in practice.
What to do instead
Study the domain by framework: schools of criminological thought with their core claims and criticisms, types of criminal investigation and their legal bases, and the division of competence between delegado and perito. For each famous case, extract the general principle it illustrates and test yourself on the principle, not the story.
In Forensic Sciences and Criminalistics, the candidate overstates what a technique can establish, treating a presumptive test as confirmatory, a probability as an identification, or a chain-of-custody step as optional, and answers questions about evidence reliability from television-style impressions.
Technical subjects are learned from summaries and media, which compress uncertainty and skip the limits of each method, while the exam tests precisely those limits and the legal consequences of evidentiary integrity.
What to do instead
For each technique, learn four things: what it detects, its limits and error rate, whether it is presumptive or confirmatory, and the legal requirement for collecting and preserving the sample. Study chain of custody as a legal requirement with consequences for admissibility, and practise distinguishing identification from probability in sample questions.
On Logic, Statistics, and Computer Science items, the candidate answers formal reasoning questions by intuition, misreads quantifiers and necessary-versus-sufficient conditions, and computes probabilities or interprets statistics without writing out the sample space or the base rate.
Candidates with humanities backgrounds avoid formal notation, so they translate logical statements loosely and let everyday plausibility override the formal structure; statistical items then fall to the base-rate fallacy.
What to do instead
Rewrite every logical statement in symbolic form before reading the options, and test each option against a counterexample. For statistics, always write the base rate and the relevant population before computing, and check whether the question asks for a conditional or a joint probability. Drill with short daily sets and review errors by category.
On Police Practice, Public Security, and Social Sciences items, the candidate answers normative questions about police conduct from personal experience or from what is operationally convenient, ignoring the legal and human-rights standards the item tests, and treats social-science concepts as opinion rather than as defined categories.
Practical experience is vivid and feels authoritative, and the candidate has not internalised that the exam measures adherence to legal standards and to defined sociological concepts, not operational folklore.
What to do instead
Anchor every answer in a norm or a concept: identify the legal standard governing use of force, approach, search, or record-keeping, then evaluate the conduct against it. For social-science items, define the concept precisely (its author, its scope, its contrast concept) before choosing. Review each error by asking which standard you failed to apply.
On Tax Law and Environmental Law, the candidate answers from general impressions about 'who should pay' or 'what is obviously harmful', without applying the constitutional allocation of taxing competence, the specific environmental licensing regime, or the administrative liability rules that the item actually tests.
These are the least familiar domains for most candidates, so they rely on intuition and on the few high-profile cases they know, missing the technical rules that determine competence, procedure, and liability.
What to do instead
Build a competence table for taxes (entity, legal basis, fact generator, limits) and a regime table for environmental law (licensing stages, competent body, administrative, civil, and criminal liability, and their independence). For each fact pattern, first identify which entity or body has competence, then apply the regime, before considering the merits.