RURAL DONNA--The Hidalgo County sheriff's office needs your help identifying a person of interest who allegedly robbed a woman at knife point. 

The sheriff's office received a photo of the person of interest through an activated cell phone application. The robbery back in February on Grano De Oro near Alberta road and Val Verde road in  Rural Donna. The suspect stole the victim's phone and left in a grey Chevy Malibu driven by another man.

If you know anything, call the Hidalgo County crime stoppers hotline at 956-668-8477 (TIPS).