Grass Valley Police Department Thursday 10:53 a.m. — A caller on the 100 block of Hughes Road reported a male subject threatening him with a knife. 11:22 a.m. — A caller on Primrose Lane reported a burglary. 2:04 p.m. — A caller on the 100 block of East Main Street reported a woman banging her head on the outside window of a black BMW and acting strange. 4:47 p.m. — A caller on the 300 block of Sutton Way reported the theft of a tablet computer and a digital camera. 5:09 p.m. — A caller on the 300 Sutton Way reported an assault: …