Perhaps I missed it, but how was this murder terrorism?
I thought everyone was familiar with the process thanks to the Saturday morning cartoons, but perhaps some of you Delinquent Terrorees need it spelled out.
After a crime or crime-like event, what'll happen is that someone on the Terroree Committee announces their IBA (Intent to Become Afraid). Another committee member seconds this, possibly after some out-of-band side-dealing. This brings the terror (small "t") to the floor, where a wider discussion ensues. If seven ninths of the committee supports Afraidity, then goes to the larger Terroree Assembly for more debate and ultimately a straight majority vote. (I'm oversimplifying here, but I'm not sure how much detail you were requesting.)
If it wins the vote, it is promoted to a Terror (large "T"). A Terror's actors become "terrorists" and the action "terrorism" and so on. If no motive for the terrorism is found (no one comes forth and explains their demands and that they performed the act in order to persuade the public to see things their way, the classic boilerplate being "I committed that violent action in order to prove that my views are the wisest views") then something can be made up -- technically after being sent back to the Terroree Committee. To save time, the original committee's meeting may come with a non-binding suggested motive, and after the assembly's Terror vote, a popular Terror will often immediately proceed to a vote on the suggested Terror Motive.
All members of the Terroree Assembly agree, as a condition for joining the assembly, that they will comport Afraidity with any and all Terrors, without exception, and regardless of however they voted upon the original terror (the "Mandated Afraidity"). This helps to address charges of illegitimacy, so that we don't have a repeat of the Cole incident (where it languished in Terror Court after passing the assembly (with high absenteeism) and a poll of the assembly members found that 87% of its members hadn't been Afraid).
The Mandated Afraidity, while once thought of as draconian and overburdensome, is now widely accepted thanks to a notification network which helps to keep assembly members up-to-date and informed about exactly what to fear, how to persuade the public to comport Afraidity, etc.