William P. Dean was accused of, on this day in 1842, levying war against the state of Rhode Island, presumably as part of the Dorr Rebellion. I can't find anything about him other than this primary source. Anyone?
"And the jurors aforesaid, upon their oaths aforesaid, do further present: That the said William P. Dean, being an inhabitant of and residing within the said State of Rhode Island and Providence Plantations, and being under the protection of the laws of the said State of Rhode Island and Providence Plantations, and owing allegiance and fidelity to the said State, not weighing the duty of his said allegiance, and wickedly and traitorously devising and intending the peace of the said State to disturb, and to stir up, move, and excite insurrection, rebellion, and war against the said State, on the twenty seventh day of June, in the year of our Lord one thousand eighteen hundred and forty two, at Glocester aforesaid, in the aforesaid country of Providence, with force and arms, unlawfully, falsely, maliciously, and traitoriously did conspire, compass, imagine, and intend to raise and levy public par, insurrection, and rebellion against the said State; and in order to perfect, fulfil, and bring to effect the said compassings, imaginations, and intents of him, the said William P. Dean, he, the said William P. Dean, afterwards, to wit, on the said twenty-seventh day of June, in the year of our Lord one thousand eight hundred and forty-two, at Glocester aforesaid, in the aforesaid county of Providence, with a great multitude of other persons, whose names are at present to the jurors aforesaid unknown, to a great number, to wit, to the number of five hundred other persons, and upward; armed and arrayed in a warlike manner, that is to say, with guns, muskets, swords; pistols, dirks, and other warlike weapons, as well offensive as defensive, being then and there unlawfully, maliciously, and traitorously assembled and gathered together, did falsely and traitorously assemble and gather themselves together against the said State, and then and there, with force and arms, did falsely and traitorously, and in a warlike and hostile manner, array and dispose themselves against the said State; and then and there, that is to say, on the day and year last aforesaid, at Glocester aforesaid, in the aforesaid county of Providence, in pursuance of their traitorous intentions and purposes aforesaid, he, the said William P. Dean, with the said other persons so as aforesaid traitorously assembled, and armed and arrayed in manner aforesaid, most wickedly, maliciously, and traitorously did ordain, prepare, and levy public war against the said State, contrary to the duty of the allegiance of the said William P. Dean, against the form of the statute in such case made and provided, and against the peace and dignity of the State."