I recall a passage in Michael Crichton's The Great Train Robbery (perhaps not the best historical source) that mentions a married woman forger who, upon being caught by the police, simply told them where to find her husband, at which point they went out and arrested him for her crime.
Now, I'm passingly familiar with coverture, so this doesn't sound incredibly far-fetched, but I'm wondering if this could have indeed happened. If true, what categories of crimes might a husband be tried for? When did the practice end?
Blackstone's Commentaries has it that:
In criminal prosecutions, it is true, the wife may be indicted and punished separately; for the union is only a civil union.
(all from his volume 1 chapter on marriage. You can even find an example of a married woman forger from the 18th century charged for her crimes, and seemingly not her husband.
However, that "may" is relevant. Blackstone also says that:
But though our law in general considers man and wife as one person, yet there are some instances in which she is separately considered; as inferior to him, and acting by his compulsion...And in some felonies, and other inferior crimes, committed by her through constraint of her husband, the law excuses her: but this extends not to treason or murder.
It's almost more like a duress defense, not so much that the husband is understood to have commit the crime but that the law accommodates the theory that she's acting at direction and that her husband has knowledge of what's going on. I don't have details for specific crimes, but if memory serves the actual implementation was sort of a mess anyway.