Task: Translation
Input (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.
Output (Chinese): 随后加拿大皇家骑警内部调查发现阿拉尔案件中存在多起不当行为，包括向美国官员提供有关阿拉尔的敏感信息，以及联络官可能知道驱逐计划但未联系其上司。