If the perp was using them, he was leaving an electronic trail.
I think it suffices that We can now show an electronic trail of three transfers of ownership.
Every time we make a phone call, use E-mail or purchase anything by credit card, we've left an electronic trail.
Each movement broadcast sounds and scent and an electronic trail, an aura of impulses.
He had been staring at computer screens all day, working to trace the electronic trail of the billions stolen from the World Bank.
I paid in cash-I don't like to leave an electronic trail behind me-and raised my glass.
He emailed every once in a while, and eventually I had a jumper follow the electronic trail and track him down.
There is usually very little in the way of an electronic or paper trail when it comes to terrorists.
He had no idea that an amateur hacker like Mickey would leave an electronic trail that could lead to a beating.
But today many of these records are electronic, resulting in an "electronic trail".