Help me find the source of this story

[The Grave Maurice]

Pinkerton,

I think the incident is related by B. Leeson in his Lost London: The Memoirs of an East End Detective, but I'll have to check when I get home this evening.

[Pinkerton]

I specifically remember reading a story on the Casebook (don't know if it was from a newspaper, snippet from a book, or what) where a policeman was relating the story of investigating a Ripper crime. At the scene of the investigation the officer suddenly spotted one George Squibb out of the corner of his eye, who was wanted for some previous crime. The officer gave chase to Squibb and cornered him in a house. Thinking that the policeman was actually chasing the Ripper a mob of people surrounded the house and were trying to get to George Squibb (presumably to lynch him). Many officers had to protect Squibb from the mob and eventually got him out of the area and to the police station.

When I search the Casebook for "Squibb" it only brings up a single newspaper article the relates a previous arrest of George Squibb, and not the story I've just related. Does anyone know where this story came from? Was it from the biography of a former police official? I can't seem to locate the source. Thanks.