After Eva is arrested for stabbing her husband, Olivia persuades ADA Cabot to give her a Desk Appearance Ticket (DAT) instead of taking her to arraignment court that night. At the time, DATs were given only for violations, misdemeanors, and E-class felonies. Since stabbing someone would be considered "Assault in the Second Degree" -- a D-class felony -- Eva would not have been eligible for a DAT.
In Cabot's office after the first court hearing. When someone calls Cabot's office asking for Eva. Alex answers the phone saying "Alexander Cabot" when her name is Alexandra Cabot.