Task: Translation
Input (Japanese): 以降、RCMPの内部調査でアラール氏の事件において、アメリカ当局へのアラール氏の詳細な情報の提供と、連絡将校が強制退去計画を知りながら彼の上司に連絡しなかったことを含む複数の不正の事実を発見した。
Output (English): A subsequent internal RCMP investigation found several instances of impropriety in the Arar case, including the provision of sensitive information on Arar to US officials, and that a liaison officer may have known of the deportation plan but did not contact his supervisors.