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Criminal Law sample analysis

MBE Criminal Law Mens Rea Trap: Burglary vs Larceny

Work through a fresh burglary-vs-larceny mens rea trap with examiner-style analysis, distractor notes, and a short quiz teaser.

Byline BarPrepPlay
Last reviewed March 12, 2026
Page type Static MBE topic page

Fact pattern

Theo slipped into a closed campus bookstore through an unlocked side door at 11:30 p.m. He intended only to sleep inside because his dorm was locked for repairs. Once inside, Theo noticed a display laptop on the counter, decided to take it, and hid it in his backpack before leaving through the same door. Theo is charged with burglary and larceny under a statute that tracks the common-law burglary elements unless the statute says otherwise.

Quick answer

Theo likely committed larceny but not burglary because he formed the intent to steal only after entering the bookstore. At common law, burglary requires a breaking and entering of the dwelling of another at night with the intent to commit a felony inside at the time of entry. Modern statutes often broaden the building element, but the timing of intent remains central: the defendant must have the necessary criminal intent when entering. Larceny requires a trespassory taking and carrying away of the personal property of another with the intent to permanently deprive the owner. A later-formed intent inside the building can satisfy larceny even when it is too late for burglary.

Canonical URL: https://www.barprepplay.com/mbe/criminal-law/burglary-larceny-mens-rea-trap/

IRAC model answer

Issue

Did Theo commit burglary, larceny, both, or only one of the two offenses?

Rule

At common law, burglary requires a breaking and entering of the dwelling of another at night with the intent to commit a felony inside at the time of entry. Modern statutes often broaden the building element, but the timing of intent remains central: the defendant must have the necessary criminal intent when entering. Larceny requires a trespassory taking and carrying away of the personal property of another with the intent to permanently deprive the owner. A later-formed intent inside the building can satisfy larceny even when it is too late for burglary.

Application

Theo is the classic timing trap. He clearly formed an intent to steal the laptop before he left, and hiding it in his backpack followed by leaving the store is enough for larceny because he took and carried away another's property with intent to permanently deprive. Burglary is harder. The facts say Theo entered only to sleep inside, not to steal. That means he lacked felonious intent at the moment of entry. If the jurisdiction follows the common-law timing rule, Theo cannot be guilty of burglary merely because he later decided to steal while already inside. The prosecution will argue that entering a closed bookstore at night through a side door looks suspicious enough to infer intent to steal from the outset. But the problem specifically supplies a non-felonious entry purpose, so the better exam answer is that the later theft does not retroactively create burglary intent. If a modern statute defined burglary more broadly to include remaining unlawfully with intent to commit a crime, the result could change. The prompt, however, points back to the common-law structure unless otherwise stated, so the timing rule controls.

Conclusion

Theo likely committed larceny but not burglary because he formed the intent to steal only after entering the bookstore.

Numbered reasoning steps

  1. Separate the entry offense from the taking offense before applying any facts.
  2. Focus on the defendant's mental state at the instant of entry for burglary.
  3. Explain why a later theft can still satisfy larceny even if burglary fails.
  4. Use the prompt's reference to common-law burglary to reject broader modern alternatives unless supplied.
  5. Mention the possible modern-statutory variation only after giving the common-law answer.

Why wrong answers fail

Theo committed burglary because he stole once inside.

That ignores the timing element. Common-law burglary requires felonious intent at entry, not a later decision.

Theo committed neither offense because the door was unlocked.

An unlocked door may weaken the breaking issue in some formulations, but it does not erase larceny, and slight force is often enough for burglary anyway.

Theo committed burglary because the bookstore was closed at night.

Nighttime matters to classic burglary, but it does not replace the intent-at-entry requirement.

Theo cannot be guilty of larceny because he formed intent inside the store.

Larceny turns on the intent to steal at the time of the taking, not at the time of entry.

Issue-spotting checklist

  • Write burglary and larceny as separate elements lists.
  • Test Theo's purpose at entry before talking about the laptop.
  • Do not let suspicious entry facts override an express statement of innocent or non-felonious purpose.
  • Remember that a later decision can support larceny even when burglary fails.
  • If you mention a broader statute, label it as a variation and return to the common-law rule.

Primary law and source anchors

  • People v. Gauze, 542 P.2d 1365 (Cal. 1975) Burglary focuses on unlawful entry with felonious intent, not merely later misconduct inside.
  • People v. Davis, 957 P.2d 1183 (Cal. 1998) The timing and content of the intent to steal drive the theft and burglary analysis.
  • Commonwealth v. Ryan, 979 N.E.2d 1065 (Mass. 2012) Modern burglary statutes may broaden the offense, but the classic exam trap remains the intent-at-entry requirement.