The defense strategy was to impeach the testimony of the key prosecution witnesses: Lloyd and Weichmann. It also wished to show that she was loyal to the Union, her trips to Surrattsville were of an innocent nature, and she had not been aware of Booth's plans. There were 31 witnesses who testified for the defense. George H. Calvert testified that he had pressed Surratt to pay a debt, Bennett Gwynn said Surratt had sought payment from John Nothey to satisfy the Calvert debt, and Nothey agreed that he had received a letter from Surratt for him to appear at the tavern on April 11 to pay what was owed. Several witnesses impugned Lloyd's character by testifying about his alcoholism, while others said he was too intoxicated on the day of Lincoln's assassination to remember that day clearly. Augustus Howell, a Confederate agent, testified Weichmann was an untrustworthy witness, as he had sought to become a Confederate spy himself. (The prosecution had attempted to show that Howell was a Confederate spy and should not be trusted.)