The purpose of the graduate thesis is to emphasize the importance of forensic veterinary expertise in cases of reasonable suspicion of committing the criminal offence referred of illegal hunting and poaching. Nowadays, poaching represents a major problem to authorised persons of the right of hunting and game breeders. In order to solve observed criminal case file K-58/08 the Court has entrusted the ballistic expertise to Forensic Science Centre (FSC) “Ivan Vucetic” of the Ministry of Interior of the Republic of Croatian and the veterinary expertise to Department for Forensic and Administrative Veterinary Medicine, Veterinary Faculty, University of Zagreb. Because of the small number of data in the writings and statements which by court-appointed expert of Faculty of Veterinary Medicine, University of Zagreb, received it was not possible to claim with certainty that the roe deer was ill and that's the reason why dog bite her. Also, on the roe deer's carcass weren’t found bite wounds. It was found only that the animal was shot by firearm, entry wound on the right and exit on the left. Expert evaluation of weapons at the Center for crime analysis revealed that a contentious grain does not belong to any of the submitted rifles. The defendant testified that he shot in the wounded deer which one dog bitten but we do not know if there is another weapon which defendant didn't gave and which one we can't see in the files. If data was taken in a proper way and if veterinarian came at the crime scene, we would be able to know in which condition the animal was found. According to above mentioned, due to lack of data, veterinary expert can only provide basic information about the condition of the animal i.e. carcasses.