Grass Valley Police Department Friday 8:04 a.m. — A caller from the 400 block of Mill Street reported a squatter living in a house he recently purchased. 9:04 a.m. — A caller from Memorial Park reported someone entered the annex building but did not do damage. 10:19 a.m. — A caller from the 500 block of Jenkins Street reported the theft of $400 by a former roommate. 2:22 p.m. — A caller from Mainhart Drive reported finding a large knife stuck in the ground and did not want to touch it. 2:32 p.m. — A caller from the 100 block …