But then,in this case one of the three deceased is said to have been a "friend" of our Chechen jihadi.
Your cautions are very general. But clearing cold cases in general doesn’t fit this situation.
One of the three victims was someone close to older brother. All were JEWS, older brother has recently revealed himself to be a jihadist and they hate Jews above all. Their throats were cut. A jihadist specialty. Think what a set up for older brother, he pretends to befriend a Jew. He then becomes acquainted with friends of that Jew. None of them realize he’s a jihadist and they don’t know he’s a threat. So he catches them together, on Sept. 11 which is a great day to kill in the minds of jihadists, and they think he’s a good guy but he kills them all, instead.
See the difference in THIS case, and just any generic cold case??