In October 1961, ballistics tests were run with improved technology using Sacco's pistol. The results confirmed that the bullet that killed Berardelli in 1920 came from the same .32 ACP taken from the pistol in Sacco's possession. Subsequent investigations in 1983 also supported Goddard's findings, however, supporters of innocence have disputed both tests, nothing that ballistics experts conducting the first test had claimed Sacco's guilt even before the tests, and that by the 1980s, the old bullets and guns were far too rusty to prove anything. There was also no evidence Sacco had fired the gun.