The existing research on lone wolf terrorism and the use of case study research within this field and criminology is discussed and reviewed. In an attempt to find how an investigated and IS inspired extremist commits an act of lone wolf terrorism without any suspicion of authorities was the key focus. Through the use of a case study utilizing a chronological time-series analysis, Man Haron Monis responsible for the Martin Place Siege in Sydney, Australia in 2014 was examined. The analysis produced eleven significant events contributing to his radicalization. His radicalization process and the causal factors were examined against two radicalization pyramids developed by McCauley and Moskalenko (2014) that placed him at the most dangerous level of a lone wolf about to act. This thesis also indicates the limitations of lone wolf terrorism research and the further steps required in order for authorities to effectively identify and disrupt lone wolf terrorists prior to terrorist acts.