Lol, if he's started crowing, he's a rooster. It is weird that he doesn't have saddle feathers, though. Maybe he's a hermaphrodite. If he lays an egg, be sure to let us know!
I bought 4 black stars who all turned out to be hens, they were a pairing of Rhode Island Red Roo to a Barred Rock Hen, and at the same time bought 2 Red Star hens. The red star hens were the offspring of a pairing of Rhode Island Red Roo to a Rhode Island White Hen. I bought all six of these chickens from a local farm, who is well respected in this area for breeding and selling chickens. I can go take pictures of the red star that is his/her sister, who is definitely a hen. They look very different. The suspected roo pictured above had the head of a rooster but lacks the saddle feathers. He/she is almost a year old and just started crowing, even with the presence of a salmon faverolle rooster that leads the flock. I was wondering if this could be some kind of weird fluke, and this is actually a Roo?