"In due course, following an additional debriefing, the FBI confirmed to me and to my former counsel, Tom Carter, that I was not a suspect in this case. I assumed that my involvement in the investigation was over"

The quote by Steven Hatfill shows a defining moment in his life, particularly associated to his participation in a high-profile FBI investigation. To understand its ramifications, it's important to think about the context. Hatfill, a previous U.S. Army biodefense researcher, was at one point considered a "individual of interest" by the FBI in the 2001 anthrax attacks that followed soon after the September 11 terrorist attacks. These attacks involved letters laced with anthrax spores sent out to numerous news media workplaces and two Democratic Senators, leading to five deaths and a number of infections.

The phrase "In due course, following an extra debriefing" recommends that the process resulting in his exoneration was lengthy and meticulous, including thorough scrutiny and numerous debriefings. This option of words shows Hatfill's situation of having his life put under a microscopic lense by federal authorities. His mention of "an additional debriefing" indicates ongoing investigations and interactions with the FBI, highlighting the exhaustive nature of such questions and the pressure he should have faced during this duration.

The verification from the FBI "that I was not a suspect in this case" acts as a substantial pivotal moment for Hatfill. By mentioning this openly, he underscores the ultimate official acknowledgment of his non-involvement in the anthrax attacks. This minute most likely marked a considerable relief and a lifting of suspicion from his individual and expert life. It also indicates a possible resignation to the examination's demands and a determination to comply fully to clear his name.

Hatfill's presumption that "my involvement in the investigation was over" further highlights his desire to move beyond this hard chapter. It's a declaration filled with both hope and weariness, meaning his anticipation of going back to normalcy after an experience that had likely overthrew his life in considerable ways. His reference of "my previous counsel, Tom Carter" suggests a respectful acknowledgment of the professional assistance received throughout this trying time.

Overall, Hatfill's declaration encapsulates his journey through suspicion, investigation, and eventual exoneration, clarifying the individual impact of being embroiled in a national security examination.