
Do you have questions and won’t rest until you get answers? Find private investigators in your local area to conduct a thorough inquiry and bring the facts to you. At Advanced Investigative Services, Inc, we offer a range of personal, professional, and business investigative services to those in Coles County, IL, and throughout the surrounding areas.
We started in 1996, thanks to retired police captain William R. Barrett, and we employ former law enforcement professionals from the local, state, and federal levels. Additionally, our experienced staff offers over 100 years of combined investigative experience. Trust our professionals for everything from employment screenings to surveillance investigations and background checks.
Our investigative services include:
Those in the Coles County, IL, area know to contact the private investigators at Advanced Investigative Services, Inc to ensure the quality and depth of their investigations. Our trained professionals use years of experience to provide complete personal, professional, and business investigations throughout the local community.
Some of the individual investigations we perform include pre-marital background checks, civil suit investigations, divorce investigations, and missing-person searches. We also serve professionals and businesses with a variety of services such as pre-employment screenings, background checks, workers’ compensation claims, pre-trial investigations, process services, and more.
Utilizing experts from multiple fields, we work to ensure accurate and reliable investigative results.
We proudly provide investigative services to those in Coles County, IL, and throughout the surrounding communities. Our staff is located across multiple states to ensure we can pursue your case wherever it leads.
Let our licensed professionals install a surveillance system for your property complete with 24/7 internet accessibility. The goal of Advanced Investigative Services, Inc is to provide accurate investigations at competitive rates our clients can afford.
Call for a free, no-obligation consultation or visit our website for additional details.


Are you looking for a professional private investigator to look into a business or personal matter? If so, Advanced Investigative Services, Inc has been a trusted leader in investigative services since 1996.
We have a team of experienced investigators with the skill set to handle many different types of investigations. Whether you are searching for a missing person, want to perform background checks on potential employees, or need video surveillance services, Advanced Investigative Services, Inc is ready to help.