3.1 English Grammar, Syntax & Sentence Structure in Law Enforcement Reports

3.1 English Grammar, Syntax & Sentence Structure in Law Enforcement Reports

In the United States Secret Service (USSS) and broader federal law enforcement community, an investigative report or administrative memorandum is a legal document that may be entered into evidence, reviewed by federal prosecutors, subjected to defense cross-examination, or audited by congressional oversight committees. Grammatical precision and syntactic clarity are not merely stylistic preferences; they are essential operational requirements. On the Secret Service Special Agent Entrance Exam (SAEE), the Language Use section tests your ability to identify, analyze, and correct grammatical errors, awkward sentence structures, and syntactic flaws commonly found in investigative writing.

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1. Subject-Verb Agreement in Complex Federal Sentences

Subject-verb agreement requires that singular subjects take singular verbs and plural subjects take plural verbs. While simple sentences present little difficulty, federal law enforcement reports often utilize complex sentence structures with intervening prepositional phrases, relative clauses, or compound subjects that obscure the true grammatical subject.

Intervening Prepositional Phrases and Clauses

Do not allow words that come between the subject and the verb to confuse you regarding the subject's number.

• Incorrect: The list of suspects, including two individuals fleeing the perimeter, were transmitted to dispatch.
• Correct: The list of suspects, including two individuals fleeing the perimeter, was transmitted to dispatch.

In the sentence above, the true subject is the singular noun list, not the plural noun suspects or individuals. The phrase including two individuals fleeing the perimeter is a non-essential prepositional/participial phrase acting as a modifier.

Collective Nouns in Law Enforcement Contexts

Collective nouns such as detail, team, squad, panel, division, and agency take a singular verb when the group acts as a single unit. They take a plural verb only when the members of the group act as separate individuals (a rare usage in formal report writing).

• Correct (Single Unit): The Secret Service protective detail was deployed to the south venue at 0600 hours.
• Correct (Single Unit): The Counter Assault Team (CAT) maintains continuous operational readiness.
• Incorrect: The Joint Terrorism Task Force are conducting interviews in the western district.
• Correct: The Joint Terrorism Task Force is conducting interviews in the western district.

Compound Subjects Joined by Conjunctions

• Subjects joined by and take a plural verb: Agent Vance and Investigator Miller were assigned to the executive protection detail.
• Subjects joined by or, nor, either...or, or neither...nor require the verb to agree with the subject closest to the verb:
  • Neither the lead agent nor the assisting officers were aware of the breach. (Plural verb agrees with officers)
  • Neither the assisting officers nor the lead agent was aware of the breach. (Singular verb agrees with agent)

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2. Modifier Placement: Misplaced and Dangling Modifiers

A modifier is a word, phrase, or clause that describes, limits, or qualifies another element in the sentence. For maximum clarity in investigative reports, modifiers must be placed as close as possible to the words they modify.

Misplaced Modifiers

A misplaced modifier is incorrectly separated from the word it modifies, creating confusion, unintended humor, or factual inaccuracy in an official record.

• Misplaced: The agent searched the vehicle driven by the suspect with a high-powered flashlight.
  • Analysis: Was the suspect driving with a flashlight? The prepositional phrase with a high-powered flashlight should modify searched, not driven.
• Corrected: Using a high-powered flashlight, the agent searched the vehicle driven by the suspect.
• Misplaced: The witness described the fleeing subject wearing a red jacket to Special Agent Myers.
• Corrected: The witness described to Special Agent Myers the fleeing subject who was wearing a red jacket.

Dangling Modifiers

A dangling modifier occurs when the word or phrase being modified is completely omitted from the sentence. Dangling modifiers frequently occur at the beginning of sentences featuring introductory participial phrases.

• Dangling: Running down the north hallway, the weapon was discarded in a trash receptacle.
  • Analysis: The phrase Running down the north hallway grammatically modifies the weapon, creating the absurd statement that the weapon was running. The person running is missing from the clause.
• Corrected: Running down the north hallway, the suspect discarded the weapon in a trash receptacle.
• Corrected: As the suspect ran down the north hallway, he discarded the weapon in a trash receptacle.
• Dangling: Upon searching the suspect's residence, counterfeit notes were seized.
• Corrected: Upon searching the suspect's residence, federal agents seized counterfeit notes.

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3. Active Voice vs. Passive Voice in Official Reporting

In federal report writing, sentence voice dictates whether the grammatical subject performs the action (active voice) or receives the action (passive voice).

Why Active Voice Is Preferred

Federal investigative standards mandate active voice because it establishes unambiguous accountability. In court testimony, defense attorneys often exploit passive voice to question who performed specific actions or who had custody of evidence.

• Ambiguous Passive: The evidence bag was placed in the secure locker without an evidence tag. (Who placed it?)
• Clear Active: Special Agent Chang placed the evidence bag in the secure locker without an evidence tag.

Appropriate Uses of Passive Voice

Passive voice is acceptable in official reports only when:

1. The actor is genuinely unknown: The front entrance lock was bypassed by an unidentified instrument.
2. The focus is intentionally on the victim or result: The dignitary was immediately shielded by protective agents.

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4. Run-On Sentences, Comma Splices, and Sentence Fragments

Maintaining proper sentence boundaries is critical for structural clarity. SAEE Language Use items frequently challenge candidates to identify and correct sentence boundary errors.

Sentence Boundary Errors
├── Sentence Fragment (Incomplete thought; missing subject or finite verb)
├── Run-On / Fused Sentence (Two independent clauses joined with no punctuation)
└── Comma Splice (Two independent clauses joined ONLY by a comma)

Sentence Fragments

A fragment is a dependent clause or phrase standing alone as if it were a complete sentence. It lacks an independent subject, a finite verb, or a complete thought.

• Fragment: Although the suspect attempted to conceal the electronic storage device during the execution of the search warrant. (Dependent clause left hanging).
• Corrected: Although the suspect attempted to conceal the electronic storage device during the execution of the search warrant, agents recovered the drive in the master bedroom.

Run-On (Fused) Sentences and Comma Splices

A run-on sentence joins two independent clauses without any punctuation or coordinating conjunction. A comma splice improperly joins two independent clauses with only a comma (without a coordinating conjunction).

• Run-On: Agent Brooks secured the perimeter Agent Vance initiated the interview.
• Comma Splice: Agent Brooks secured the perimeter, Agent Vance initiated the interview.

Four Ways to Correct Comma Splices and Run-Ons:

1. Separate into two sentences: Agent Brooks secured the perimeter. Agent Vance initiated the interview.
2. Use a semicolon: Agent Brooks secured the perimeter; Agent Vance initiated the interview.
3. Use a comma and coordinating conjunction (FANBOYS: for, and, nor, but, or, yet, so): Agent Brooks secured the perimeter, and Agent Vance initiated the interview.
4. Subordinate one clause: While Agent Brooks secured the perimeter, Agent Vance initiated the interview.

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5. Pronoun-Antecedent Agreement and Ambiguous References

A pronoun must agree in gender and number with its antecedent (the noun it replaces). Furthermore, every pronoun in a law enforcement report must point unambiguously to one specific antecedent.

Ambiguous Pronoun References

When a sentence contains multiple nouns of the same gender or number, using a pronoun can create legal ambiguity regarding who performed an action.

• Ambiguous: The agent notified the supervisor that he needed to complete the chain-of-custody form.
  • Analysis: Does he refer to the agent or the supervisor?
• Corrected: The agent notified the supervisor that the agent needed to complete the chain-of-custody form.
• Corrected: The agent said to the supervisor, "I need to complete the chain-of-custody form."

Broad or Vague Pronoun References

Avoid starting sentences or clauses with this, that, which, or it unless the pronoun clearly refers to a single, specific noun rather than an entire general idea.

• Vague: The suspect resisted arrest and fled across the highway, which caused a multi-vehicle collision.
• Corrected: The suspect resisted arrest and fled across the highway; this evasive action caused a multi-vehicle collision.