Creepy man at Grove St Path

My friends and I were waiting at the Grove St Path about an hour and half ago. The construction made things very tight so this older heavy set man with a beard wearing all black came up to us and didn’t say a thing. He started staring at one of my friends in a very creepy way. He then started to approach her, she felt uncomfortable and she stood behind her boyfriend. They both moved and the man continued to follow and stare at my friend. It was honestly so creepy and uncomfortable because he started to smile and you can tell there was nothing behind his eyes. We all yelled at him so he would leave us alone and he wouldn’t until we had to leave the station and not take the path. He even followed us to the stairs until we were out of the station. There were no cops, no one to help. Please watch out for this man. He is about 5’5, facial hair, and heavier set wearing black.