The senator, a former prosecutor, said early in the day that she didn’t expect to be chosen.
But after a day of tweeting about the television shows the jury pool was watching, what she wore and what was for lunch, the senator was surprised to be chosen.
McCaskill tweeted: “HOLY X@#(asterisk)! I am on the jury” then stopped using social media.
Details of the case McCaskill was chosen for were not immediately available.