The term police headquarters is identified in base64 scheme by the sequence cG9saWNlIGhlYWRxdWFydGVycw==, while the MD5 signature is equal to 6a2fe7825969c7c2388152b49ae5c1f5. The ASCII encoding of police headquarters in hexadecimal notation is 706f6c69636520686561647175617274657273.