Kathryn Erbe'Law & Order: Criminal Intent' star Kathryn Erbe may catch criminals on her hit show, but she needed the help of the NYPD to track down an aspiring singer accused of being her real-life stalker.

The actress, who plays Detective Alex Eames opposite Vincent D'Onofrio on the NBC-USA show, was allegedly targeted by Philadelphia-based singer-songwriter Charles Nagel, who uses the stage name Chaz Rose. The NY Post reports that Nagel had been sending letters and e-mails to the actress professing his love for the past three years, as well as visiting the 'Criminal Intent' set in both New York and California.