on the trail of (someone or something)

on the trail of (someone or something)

Following, pursuing, or tracking someone or something. Police are on the trail of two armed men who held up a liquor store late last night. Our top detective is on the trail of the stolen goods, sir.See also: of, on, trail

*on the trail (of someone or something)

 and *on the track of someone or somethingseeking someone or something; about to find someone or something. (*Typically: be ~; get ~.) I'm on the trail of a new can opener that is supposed to be easier to use. I spent all morning on the track of a vendor who can meet our requirements.See also: on, trail