Meet Our Investigation Team



Brenda McGinley — Private Investigator in Indianapolis, IN

Brenda McGinley

CEO & Operations Manager

After 19 years as the Director of Operations for International Investigators, Inc, Brenda took over the ownership of the company in December 2017. She merged a new investigative agency in Indianapolis, All In Investigations, with International Investigators. Although Brenda is the owner, she kept her position as Director of Operations in order to maintain and continue building personal relationships with current and future clientele, staff and sources.
For almost two decades, Brenda had been an integral part of International Investigators’ operations. During this time Brenda recognized the importance of incorporating newer technologies into the investigative process so information can be gathered more proficiently. Her vision for the company includes building its status as a leader in technical investigations while preserving International Investigator’s “gum shoe” reputation.

Tim Wilcox — Private Investigator in Indianapolis, IN

Tim Wilcox


In the 1960s, Tim Wilcox provided security consultation for International Investigators when it was still operated by the original founders. His preliminary collaboration with the former FBI, CIA and military intelligence agents of the initial International Investigators allowed him to develop a deeper understanding of the business, and eventually led to his purchase of the company in 1970. With a solid background in marketing and management, he was able to build the company into one of the most successful privately-owned investigative firms based in the Midwest. A skilled and well-known Indiana investigator, Mr. Wilcox specializes in security consultation, internal theft investigations, protection of proprietary information and communications, computer and cellular forensics and litigation support.
Michael G. Turk — Private Investigator in Indianapolis, IN

Michael G. Turk

Polygraph Examination

Prior to joining International Investigators, Michael Turk had become prominent in law enforcement serving as a Major with the Marion County Sheriff's Department (now retired) and currently with the Indianapolis Metropolitan Police Department. Mr. Turk specializes in interviewing and polygraph examinations; he has an impressive reputation for getting confessions.

CLICK HERE to view Michael's CV
James Steffen — Private Investigator in Indianapolis, IN

James Steffen

Questioned Document Examiner

For twenty-three years, James Steffen was a senior special agent with the United States Secret Service. During this career, he conducted all types of government investigations, and specialized in financial crimes involving forgery, altered or counterfeit documents. He has been performing handwriting analysis and other questioned document services for clients of International Investigators, Inc. since 1998. Mr. Steffen is a fellow of the American College of Forensic Examiners.

CLICK HERE to view James' CV
Marvin Bud McCorckle — Private Investigator in Indianapolis, IN

Marvin Bud McCorckle

PSE & Polygraph Examination

With over 35 years of experience in law enforcement, Mr. McCorkle's investigative talents are many, and his services are in demand. A senior investigator with International Investigators, Inc. since 1995, he continues to conduct voice stress analysis (PSE) and polygraph examinations for our clients. He is a certified PSE instructor for the International Society of Stress Analysis, and has conducted over 10,000 polygraph and PSE examinations. Outside of law enforcement and his investigations career with International Investigators, Inc, he has also served as Senior Director of Security and Loss Prevention in the retail industry for a corporation with over 400 stores. This experience augmented his rich background with the skills necessary to conduct expert security risk assessments and loss prevention investigations on behalf of our clients.

Bud McCorkle is a member of The American Society for Industrial Security (ASIS).

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