Whether Peaslee's preparations, solicitation, and trip toward the building were sufficiently close to arson to support an attempt charge.
Holding
The Court did not conclusively decide that question, but assumed that the evidence could support a finding of an attempt under Massachusetts's attempt statute if the indictment had been properly drawn.
Reasoning
The statute punished not every act done with criminal intent, but acts done in an attempt to commit the substantive offense. The central distinction is between noncriminal preparation and conduct sufficiently close to completion that the intended crime has become highly probable.
An attempt is clearest where the defendant has performed the last act expected of him and natural forces would complete the crime absent an interruption, such as where a lit candle has been placed to ignite combustibles but police extinguish it. It also covers failures caused by a mistaken estimate or factual mistake, such as firing at a victim and missing or trying to pick an empty pocket.
When the defendant still must perform further acts, the law must account for the possibility that he may voluntarily change his mind. Ordinarily, this is why preparation is not an attempt. But preparation can become punishable when it comes very near completion and, in light of the defendant's intent, makes the offense sufficiently probable despite a remaining opportunity to desist.
The required degree of proximity depends on the circumstances, including the alarm associated with the particular offense. The Court cited examples in which acts close to immediate execution—lighting a match to burn a haystack, entering a horse stall with poisoned food, or using a false weight to facilitate a theft—had been treated as attempts.
Applying comparable statutory authority, the Court was willing to assume that Peaslee's carefully prepared incendiary setup and his solicitation of another person to ignite it could constitute evidence of an attempt. It therefore did not rest its decision on a conclusion that the proof was necessarily too remote.