The private investigation sector has long been typified by a combination of intuition, experience, and footwork. However, it would be remiss to ignore that the private investigation industry is poised for a significant metamorphosis as we delve deeper into the 21st century. The advent of technological advancements and societal shifts are imminently set to reshape the methodologies, scope, and attributes of private investigation.

Firstly, let us delve into the technological transformations that are set to redefine the industry. The advent of Big Data and Artificial Intelligence (AI) are the two most prominent forces that are transforming the modus operandi of private investigators. Big Data refers to the enormous volume of structured and unstructured data that inundates business on a daily basis. AI, on the other hand, refers to computers programmed to "think" like humans and mimic their actions. The confluence of these two technologies has enormous potential in the private investigation industry.

For instance, AI can effortlessly sift through the deluge of data to unearth patterns and connections that would have been impossible for a human investigator to identify. This capability will be particularly useful in financial investigations, where AI tools can analyze millions of transactions to identify any anomalies that could indicate fraud. Moreover, predictive analytics, a subset of AI, can be leveraged to predict future events based on historical data. This tool could prove invaluable in preemptive investigations, where the objective is to predict and prevent illicit activities.

However, like all tools, AI and Big Data are not without their challenges and tradeoffs. The use of these technologies in the private investigation industry raises significant ethical and legal concerns. Particularly in jurisdictions with robust data protection laws, the use of AI and Big Data raises issues about consent, privacy, and potential misuse of data.

In addition, there's a certain degree of scepticism regarding the accuracy of AI. While AI is proficient in identifying patterns, it can struggle with context and interpretation. Consequently, there will always be a need for human investigators to supervise and interpret the results generated by AI tools.

Simultaneously, societal shifts are also redefining the scope and objectives of private investigators. For instance, the rise of social media has given birth to a new form of investigation – online reputation management. This entails monitoring and controlling an individual or organization's reputation on the internet.

Furthermore, the increased focus on corporate governance and accountability has led to the growth of corporate investigations, particularly in areas such as fraud detection, due diligence, and compliance checks. In a similar vein, the growing societal awareness and intolerance of harassment and discrimination have led to a surge in workplace investigations.

However, these societal shifts also bring challenges. For instance, the rise of social media has made it easier for individuals to disseminate false or misleading information, complicating the task of discerning fact from fiction. Similarly, corporate investigations require a deep understanding of complex business structures, legal regulations, and financial jargon.

The future of private investigation, then, appears to be one of complexity and nuance. On one hand, technological advancements promise to enhance the capabilities of private investigators exponentially. On the other hand, societal shifts are expanding the scope of investigations, while simultaneously raising new challenges.

In spite of these shifts, one thing remains clear: the human factor will continue to be paramount in private investigation. Irrespective of technological advancements, there will always be a need for skilled investigators who can navigate complex systems, understand human behavior, and apply critical thinking skills to solve problems.

As we proceed further into the 21st century, the role of the private investigator will not become obsolete; instead, it will evolve, incorporating technological tools into the investigative process while retaining the human element that makes investigation an art as much as it is a science. The future of the private investigation industry is not just about the changing technology; it's about the interplay between technology, society, and the human element. And that interplay is sure to make for an interesting future.