(512) 563-7940 Allen@austintxpi.com

AJ Keirn, Private Investigator Services

When asked what I do as I private investigator I can respond in a number of ways.  A few of the routine services that I provide are the following:

I provide support for criminal defense attorneys.  This consists of reviewing the case, and interviewing witnesses, who may have been reluctant to speak with the police, but feel they need to give a statement.

I provide support for family law attorneys.  This consists of serving civil process.  Occasionally, I’m asked to conduct surveillance on an estranged spouse and document their activities.  Usually, what the opposing party is wanting to know is if the estranged spouse is having an affair.

I also assist families with child custody cases.  In a lot of these cases the judge provides a set of parameters that parents have to follow.  If the parameters are not being following by the opposing parent then I will be hired to document what is occurring while the child is in that parent’s custody.

Lastly, I provide support for personal injury attorneys.  This consists of obtaining documents, interviewing witnesses, and either photographing a scene or the client’s vehicle.

These are just a few services that I perform as a private investigator.

Austin, Texas DNA Analysis

Austin, Texas DNA Analysis

Bloodstain Pattern Analysis

The use of BPA can be beneficial when you don’t know what happened or the story just doesn’t add up. Hokey as it sounds, the blood can tell a story of what happened. The use of the spatter left behind as a result of an event involving bloodshed can help decipher what happened at the scene. Documentation is key and can improve your case. Just ask how we can help you and your case. Do you need us to come and document the crime scene for you? Do you need to know what happened? We can help!


DNA Analysis

DNA evidence can be the most important part of your case. Some Jurors believe it is essential to have quality DNA evidence in a case for it to be successfully proven. Some cases have it and some don’t. Why not let us take a look to see? Do you have results from a laboratory already and need help interpreting the results? We offer a second look at the evidence and the associated reports/data. This ensures that the results reported match the data collected, or that the report and conclusions they are stating really truly is supported. There can be other questions answered such as: Is anyone else there? Did the lab do the best job they could? Is there anything else that could be tested or done? What do the statistics mean?


Case Consultation

The results of a case can leave you with many questions about the meaning and if more testing should be done. We can answer that. We can help you determine other evidence that may help your case. Don’t leave your case saying, could we have done more. Let us consult on your case.

Do you need help in establishing a base set of questions to ask the expert in court? Do you want some specific questions for them? Do you want to know what the results say or don’t say? What are some reasonable explanations for the results? We can help.


Evidence Evaluation

We can re-evaluate your evidence for further possibilities. Ask us how.


Paternity Case Consultation

Knowing what that paternity report says can be confusing. Don’t know what to make of it? Wanna know who the true dad is? Do you have no idea where to start to find out the paternity of someone? Please just ask. We can help.



Brandi Mohler comes to us with 10 plus years of DNA experience. She obtained her Bachelors of Science in Microbiology from Texas A&M University.

Brandi started her career doing DNA research and STR analysis with animals for paternity. She then began her career at the Texas DPS crime lab. Moving from an Evidence Technician to a CODIS Analyst II. She analyzed many offender samples and entered them into the CODIS database. She then began her position as a Forensic DNA analyst where her duties included (at the least) testimony in court, evidence collection and evaluation, DNA STR typing (in several technologies).

She has had over 50 hours of Bloodstain Pattern Analysis classroom training and has taken part in an apprenticeship with Bob Henderson. In addition, she has taught many classes on the subject of DNA, forensics, and Blood Stain Pattern Analysis. She has helped author a laboratory book for the Level One Bloodstain Pattern Analysis class taught by Bob Henderson, as well as co authored a book with Angela Tanzillo-Swarts on the Collection and Preservation of DNA Evidence. She is a member of the Association of Forensic DNA Analysts and the International Society of Forensic Genetics.