After many executions, a change in the rule of evidence for these trials excluded "spectral evidence," which was testimony by afflicted persons that they had been visited by a suspect's specter. With that change the subsequent trials resulted overwhelmingly in acquittals rather than convictions, and the later pardons were issued for several of those who had been convicted.<ref>http://www.law.umkc.edu/faculty/projects/ftrials/salem/SAL_ACCT.HTM</ref> | After many executions, a change in the rule of evidence for these trials excluded "spectral evidence," which was testimony by afflicted persons that they had been visited by a suspect's specter. With that change the subsequent trials resulted overwhelmingly in acquittals rather than convictions, and the later pardons were issued for several of those who had been convicted.<ref>http://www.law.umkc.edu/faculty/projects/ftrials/salem/SAL_ACCT.HTM</ref> |