He told her he was a high school student working on a project. All he needed was a moment of her time. But first he just needed her to let him in the house.On September 30, a Covington woman let a tall, broad-shouldered young man into her home. After she did, he threatened to harm her toddler and infant if she didn’t give him what he wanted. He then forced her to strip and sexually assaulted her.A week later police picked up 20-year-old Phillip Baldwin at a home in Maple Valley. He fit the victim’s description of a full-lipped man of about 6’3” who could still pass for a teen.Yesterday, Baldwin pleaded not-guilty to second-degree rape. He entered the same plea for another charge, this one an attempted rape in Ballard weeks before.On September 2, a 27-year-old woman told police she was walking down the street when she was tackled from behind. Punched and dragged across a yard, the woman struggled to escape.Her attacker first said he was only going to rob her. But then he forced off her shirt and started talking about sex. The attack only came to a merciless end when a neighbor wandered over to see what all the screaming was about.Baldwin is also suspected of one other assault on a woman, but he has not yet been charged for that incident.