(512) 563-7940 Allen@austintxpi.com

Allen J. Keirn, Private Investigator

We’re here for all your private investigation needs. We provide high-quality and professional service.  Contact us today.

Why You Should Hire Us

“I recently consulted with Allen Keirn, owner of A.J. Keirn Investigations, on a complex felony criminal case. Mr. Keirn was responsive, insightful and resourceful. He located information on potential expert witnesses and provided research materials relevant to the case within hours of our meeting. I also used Mr. Keirn’s services to serve an out of county subpoena. He had proper service within 48 hours. His rates are reasonable and he is easy to reach 24 hours a day.” ~ The Law Office of Robert M. McCabe, PLLC

Try A Free Consultation Today



We offer services in Austin, Round Rock, Georgetown, Leander, Cedar Park, Hutto, Taylor, Bee Cave Texas

Some of the services we have to offer are Asset Searches, Court Research Background, Divorce, Cheating Spouse Investigation, and more.

We offer a free consultation before committing to any services we have to offer.  We stand by our services and so do others.

Allen J. Keirn is a Private Investigator with years of professional investigation experience.

Austin Private Investigator / Expert Witness, A.J. Keirn, Offers Trusted, Discreet PI Services


A.J. Keirn has spent the last 20 years in the law enforcement community. After serving the Houston Police Department and the Leander Police Department, he put his experience and extensive skill-set to work as a Private Investigator and Expert Witness.

My firm has utilized the services of A.J. Keirn Investigations for a number of services. Mr. Keirn has provided background checks, process serving, and private investigation services for my firm. His rates are extremely reasonable and the personal service we receive from him is without comparison. I regularly recommend his services to my colleagues in the legal community.  — Law Office of Joshua P. Murray

When you need a versatile, skilled, and discreet private investigator who gets results call (512) 563-7940.

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Location: 213 N. Mays St., Round Rock, Texas  78664 
Phone: (512) 563-7940 | Email: Allen@austintxpi.com