What should I do found friendly lost cat?

take pictures of her and post them around if the owner dosnt call back withing a month they dont want her, if they do call back get their info and call the cops for animal neglect or some other place that deals with that. She is too beautiful a cat to have something done liek this, dont bring her to a shelter because she may end up living the rest of her life their or being killed for no reason aking up space, alot of shelters say they dont kill but in reality to do.