Prosecutors built their case on the testimony of Medlin and a parade of police officers.
Officers testified that they spent several hours each working day during the 2010 campaign putting up Leopold signs. One said he gathered information on Conti.
Officers also said they drove Leopold on Tuesdays after lunch to the bowling alley parking lot for the meetings with his mistress, and kept watch to make sure that no one happened upon the encounters.
When Leopold was at Anne Arundel Medical Center for back surgery, officers testified, he directed them to ensure that the woman didn't show up at the hospital.
Leopold's attorney's called just three witnesses: Two doctors to testify to Leopold's health in 2010, and the county personnel director, who said she processed Leopold's requests to give some of his pay back to the county.
They also entered his health records into evidence, after asking Sweeney to seal them to preserve his privacy as a patient.
Baltimore Sun reporter Erin Cox contributed to this article.
Anne Arundel County Executive John R. Leopold was found guilty Tuesday of two counts of misconduct in office after a two-week trial in Anne Arundel Circuit Court. He was found not guilty of two other counts of misconduct in office and one count of fraudulent misappropriation by a fiduciary.
Leopold was suspended from office. Chief Administrative Officer John Hammond became acting county executive.
The Anne Arundel County Council scheduled an emergency meeting for 3 p.m. Wednesday to introduce a bill to remove Leopold from office. The council scheduled a hearing and vote on the bill for Monday.
Circuit Court Judge Dennis M. Sweeney will conduct a conference call with prosecutors and attorneys for Leopold to decide a date for sentencing. Leopold remains free while awaiting sentencing.