1973-74, there was a TV show called the Snoop Sisters starring Helen Hayes and Mildred Natwick as two older amateur sleuths.
One exchange with a suspected felon went something like this, Suspected Felon to Helen Hayes as Agatha Snoop, "Madam, I know the law."
Helen Hayes' reply, "Scallywags always do."
There were only 5 episodes as it rotated on Wednesdays with Banacek and a couple of other shows, but the ladies were a delight to watch.
Helen Hayes' character was Ernesta Snoop. Not Agatha Snoop.