My name is Vojin Mastruko. I am Forensic Ballistic Expert and Gunshot Residue (GSR) Expert. After 20 years of practice in Forensic Centre in Zagreb, Croatia I have been retired and now I am acting as an independent forensic ballistic expert as well as Court Expert Witness. 

During my 22 years of practice as a Ballistic Expert Witness I realized it is hard to give a verbal explanation during Courtroom session regarding position and posture of a suspect and a victim in a moment a bullet hit the victim. Visual tools seem to be much more appropriate to illustrate possible scenarios of the particular shooting incident.

The first ballistic expert who used this visual approach in Mitchell brothers homicide case, Marin County, California in 1993. was ALEXANDER JASON. It was the first ballistic computer simulation ever allowed in a murder trial.

On Zeno's Forensic Site  (  there is a list of links to various companies, mostly from US, dealing with forensic animations.

I am a member of Firearms Working Group of European Network of Forensic Science Institutes (ENFSI)  and a member of European Academy of Forensic Science (EAFS) since 2000.

My aim is to inform Forensic Ballistic Community about this interesting technique and to find a group of colleagues willing to promote this idea among Forensic Scientists in forensic community. 

I started a Forensic 3D Discussion Group on Yahoo portal ( on 2001. Web Page of the group is and Group e-mail is This group is restricted just for members. Members can freely exchange information, chat, upload and download all type of files. To became a member you must be proposed by already existing member or invited by me as a owner of the group. All interested colleagues are welcome.

Contact me on: 





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