Which preposition to use with imposter

by Occurrences 1%

Kohlhaas, who read the letter while the children were playing with the crabs, would certainly have seized the imposter by the collar and handed him over to the soldiers standing before his door, had the circumstances been other than they were.

in Occurrences 1%

Molière who was always a close and keen observer of everything that transpired around him, seized upon the name "Tartuffe" as suitable to the hypocritical imposter in his comedy.

Which preposition to use with  imposter