highly significantp < 0.0001
The agreement for the category “motives of crime” was highly significant (Cohen’s K was 0.92, p < 0.0001; 95% CI = − 0.036–0.101), as it was for the category “contentiousness” (Cohen’s K was 0.90, p < 0.0001; 95% CI = − 0.084–0.123) and for the category “overkilling” (Cohen’s K was 0.81, p < 0.0001; 95% CI = − 0.075–0.180) suggesting, according to Viera and Garrett [ 71 ] and to McHugh [ 72 ], a substantial interrater agreement coefficient for all of these variables.