Police are trying to track down a creepy stalker who threatened Rihanna on social media.
The LAPD revealed the man, who has gone by the names Alex Mercer and Ralph Alexander, posted a selfie outside of Rihanna's former home and tweeted, "Should of killed @rihanna a minute back I would be good right now. Sorcery is a weapon I use guns, bout to get a gun license, can’t use my hands.”
Shortly after the tweet was posted, cops rushed to the home but he was gone. So now they're trying to track him down electronically by keeping an eye on his social media and phone activity.
