Murder At North Point Inn

Yesterday morning at a little before 9AM Nina Cortez was caught in a scary situation. Earlier that morning when she got into work she talked with the cook, Kevin Blohm about the night before, and then he proceeded to make her a cup of coffee.
After she had her morning coffee Nina set in counting the revenue. A minute or two later a man came around the corner carrying a knife. Nina started screaming and fell off her roller chair. The man took $130 and walked out with out even a word. She believed the man was not alone, when she heard someone scream, "Get that money out of there." Nina locked her office by then and was waiting when someone tried to get in but wasn't able to. Three to five minutes later the police were there.
When Nina walked out of her office she was able to see blood on the door in the reception area, and on the walls and floor. Kevin was on the floor with a knife wound in his hand and chest. He was dead. The man who robbed Nina was described to be 5' 10" to 6 feet tall. He is in his early 20s with a medium build. At the time he was wearing blue jeans, with a blue plaid button- up shirt, and blue tennis shoes. He also had on a floral scarf tied around his lower face, cowboy style.