A Google Inc. engineer told others at the company about his plan to scoop up personal information from wireless-network users as specially equipped cars drove by their homes, but the practice continued for two years after the internal disclosures, a Federal Communications Commission investigation found.

The engineer, whose name hasn't been disclosed, explained his plans to other engineers and at least one senior manager involved with the project, known as Street View, in 2008, the FCC report states. Nevertheless, it says,...