As a Compliance Officer at a large brokerage firm, you've recently identified unusual trading patterns over the past two weeks in a publicly traded stock, Stock X, which has a small float and moderate liquidity. Specifically, multiple linked accounts (preliminarily identified as potentially related based on IP addresses, trade timing, and trading techniques) have been engaged in small-value, high-frequency wash trading near market close. These activities have manipulated the stock price up or down in short periods, followed by unwinding positions for profit on the next day or over several days. Crucially, these unusual trades occurred prior to the company's announcement of a major asset restructuring. Your team has preliminarily identified that the ultimate beneficial owners of these accounts may be linked to a high-net-worth individual, Client C. Describe how you would systematically investigate this case, from initial discovery to final conclusion and reporting.

你作为一家大型券商的合规官，最近发现某支上市股票X（流通盘较小，流动性一般）在过去两周内出现异常交易模式。具体表现为：多个关联账户（通过IP地址、交易时间、交易手法等初步判断可能存在关联）在临近收盘时段，通过小额高频交易，反复对敲，并在短时间内推高或压低股价，随后在次日或数日内反向平仓获利。更重要的是，这些异常交易发生在公司即将发布重大资产重组公告之前。你的团队已初步识别出这些账户的实际控制人可能与某位高净值客户C有关联。请描述你将如何系统性地调查此案，从初步发现到最终结论和报告的整个过程。