User blog comment:Eobard95/OK NOW I'M CONVINCED PROMETHEUS AND HELIX ARE IN LEAGUE!/@comment-28545908-20170429013046/@comment-26624146-20170501235221

Tracking specific people's hearts without some tracking tech placed on them prior, yea. Even Cisco who can see past, present, future and other worlds needs something belonging to the person themselves to focus his tracking abilities on them. But looks like it doesn't matter though because the "heartbeat tracking technology" appears to be just an EMP, so Adrian probably set it up that false claim knowing how gulibile Felicity has become as he killed her boyfriend. If the tech is actually for real I am probably just gonna laugh.