Murder by the Clock by Rufus King — Read

The report from Central Office which Lieutenant Valcour received over the telephone contained one definitely useful piece of information: the person who had used the comb and brushes belonging to Endicott had been a blonde and was either a man or a woman with bobbed hair.

And Mrs. Endicott, Lieutenant Valcour reflected as he hung up the receiver, had blonde shingled hair. And so, except for the shingling, did Hollander.