Ronnie Ortiz-Magro's GF Called Cops in DV Arrest, Had Visible Marks - TMZ

Ronnie Ortiz-Magro ended up getting arrested because cops say his girlfriend had visible marks on her body when they showed up, responding to her call for help ...

Law enforcement sources tell us it was actually Ronnie's girlfriend, Saffire Matos, who called the police that night ...

We're told when officers arrived, they spoke to both parties, and determined Ronnie was the aggressor.

our sources tell us officers observed visible marks on Saffire's body which they determined she sustained during the alleged fight.