It's entitled, "Get the Best From Find My Past".
There's a page called "Ancestors in Crime Records"
Here's what their tips include:
CRIME, PRISONS & PUNISHMENT: Only available online at Findmypast, the National Archives’ Crime, Prisons and Punishment Collection contains over 5 million crime records from England and Wales, 1770-1935. From prison calendars to convict hulk ships, the level of detail you’ll uncover about your ancestors in these records is amazing
MUGSHOTS: Some of our crime records contain original mugshots from the time of your ancestor’s arrest – an exciting find for any family historian. When searching the Crime, Prisons and Punishment Collection, focus on the MEPO 6, PCOM 2 and PCOM 4 series which all include photographs.
ALIASES: If there is a name in your family tree that doesn’t seem to fit, perhaps it’s a black sheep with a double identity? Habitual criminals often had several aliases so watch out for forename and surname swaps as well as the use of their mother’s maiden name.
WAYWARD WOMEN: A number of our Crime, Prison and Punishment records relate to women who found themselves on the wrong side of the law. In Victorian England, for example, almost 20% of prisoners were female. This collection may be a surprising place to discover more about female ancestors.
NEWSPAPERS: Our collection of historic newspapers makes for a great research companion to our crime records. If you discover an ancestor in our crime records, be sure to search the newspapers for additional details. Arrests, court appearances and sentences would have all been covered in the local press.
LAWBREAKERS ABROAD: Findmypast’s international records include some fascinating collections for tracing your criminal ancestors. There are over 20 million Irish court and prison records to explore, as well as extensive crime, convict and transportation resources from Australia.
Thank you to FindMyPast for these helpful hints. I have not had problems finding my Fallen Acorns. Now that you have these tips, you will have more luck in finding your black sheep. Prepare yourself. You might uncover some stories that you wish you hadn't. Take it with a grain of salt. Our ancestors were not perfect. Neither are we.