They are very accurate. He killed woman and little girls. He was caught. He's in jail. An adult primary care taker is usually the culprit.
Profiles are on unknown subjects.
Sometimes murderes give themselves. With the Uni-bomber his ego gave him away completely. But no, it is not new. No necessarily it depends on what the motivation is to do the crime. You of course do see simularities when they are connected to certain motivation but the reasons vary.