N.Y. County Law § 706
Whenever the trial of an indictment has been transferred from the county in which the indictment was found to some other county, the cost and expense of such trial shall be a charge upon the county in which the indictment was found. Whenever under the order of any court of competent jurisdiction, the pleadings and issue in any prosecution for any crime or misdemeanor, for which no indictment has been found, shall have been removed to any other county in this state for trial therein, in consequence of any inability to obtain an unprejudiced or impartial jury in the county in which the venue was originally laid, the expenses of the trial of said prosecution shall be a charge upon the county from which the same was transferred. The cost and expense of trial of any prosecution, as shown by the certificate of the presiding judge or justice, shall be paid by the county from which the transfer of trial was made to the county treasurer of the county in which the trial was had.
N.Y. CountyLaw § 706