RT Article T1 Research on issues of detection, solving and evidence collecting in cases of professionally executed murders JF Revija za kriminalistiko in kriminologijo VO 67 IS 4 SP 348 OP 357 A1 Rakočević, Velimir LA English YR 2016 UL https://krimdok.uni-tuebingen.de/Record/163756192X K1 Murder K1 Detection K1 Evidence collecting K1 Unidentified perpetrators