The police are traditionally read as authority, order and conscience. Whether they protect or pursue you in the dream reflects how you feel about rules right now. Being helped by police is read as support and a sense of safety; being chased or questioned as guilt or fear of being caught out, often over something small. Calling the police is taken as asking for help or wanting a situation brought under control. Police who will not listen are read as feeling that authority is unfair. Being a police officer yourself is read as taking responsibility. The dream often reflects your inner rule-keeper, not the real law.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.