Police are investigating a possible break-in at Miley Cyrus’ home in the Valley AGAIN … TMZ has learned. Law enforcement sources tell TMZ that Miley’s assistant came home around midnight Saturday/Sunday morning when she noticed things were not in the right place — so she called cops. Reportedly there was no sign of forced entry … so officers will review Miley’s security footage to look for any clues. A fingerprint unit is also on the way to her house. Miley was not home at the time.