The case of Christina Grimmie, the Marlton, N.J., native who rose to fame on NBC's The Voice, only to be shot to death after a concert in Orlando, Fla., last June, will be featured Saturday in a two-hour edition of 48 Hours (9 p.m., CBS).

Grimmie, whose attacker then shot and killed himself, is featured in a report on stalking that includes an interview with Pauley Perrette, of CBS' NCIS, a stalking victim who is working to change laws to make it easier for police to deal with harassers, who don't just target celebrities.

Grimmie's death "should be a huge wakeup call," said Perrette.

Correspondent Erin Moriarty also interviews Justin Massler, described by CBS as "a serial stalker with diagnosed mental illness, who was arrested in 2010 for stalking President Trump's daughter, Ivanka, and who previously targeted the Kardashians."