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About Us

Law Enforcement

Detective Steve Yahnke built his professional 25 year law-enforcement career as an Auxiliary Officer in Batavia, IL; Kane County Sheriff’s Deputy in Geneva, IL; Chief of Police in Maple Park, IL; as a Law Enforcement trainer, and now as a professional private detective. Detective Yahnke had a blessed career experiencing every aspect of law enforcement:

Process Service
Undercover Operations
Fugitive Recovery
Special Operations Unit

Detective Yahnke’s law enforcement career has spanned over 25 years and he spent nearly 12 years as a Sheriff’s Sergeant. You can trust Detective Yahnke and his team of professionals to handle every situation, be it corporate, security, family, or of a more private nature.

College Instructor

In addition to his law enforcement career Detective Yahnke is an adjunct faculty member of Waubonsee Community College in Sugar Grove, IL. Since 1998, Detective Yahnke has taught Commercial Security Operations to a host of security professionals, private detectives, law enforcement cadets, and police department applicants on a bi-annual basis. This class includes criminal and civil law as it applies to private security, issues related to the appropriate use of force, security operations, weapon familiarization, weapon safety, and range operations.

Upon completion of this course the student will have demonstrated proficiency with their weapon and will have shot a qualification course of fire accepted by the Illinois Dept. of Professional Standards. Successful students will be eligible to apply for the State’s Firearms Control Card (FCC).

Training Instructor

Detective Yahnke was also been a regular Law Enforcement instructor with North-East Multi Regional Training (N.E.M.R.T.) Mobile Team 3 out of N. Aurora, IL foro ver 13 years. Detective Yahnke’s responsibilities with N.E.M.R.T. require him to be certified by the Illinois Law Enforcement Training and Standards board to teach and train police officers in the following areas of performance: Firearms Instruction, Judgment Pistol shooting, Law Enforcement Driving, Crimes in Progress, Building Search Tactics, Fundamentals of Investigations, Traffic Control, and Calls for Service.

 Our staff is carefully chosen, primarily from law-enforcement, to provide just the right service for your particular need. Let the professionals at Suburban P.I. take the worry out of your situation.



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DuPage County Office
75 Executive Dr.
Suite 421
Aurora, IL 60504
Kane County Office
2112 W. Galena Blvd.
Suite 8235
Aurora, IL 60506
Fax (630) 299-3106
Tel (630) 966-9774
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