drame familial

Wyo. Bow and Arrow Attack: Perpetrator was the son of college professor killed, say police
James Krumm and Heidi Arnold were both allegedly killed by Krumm's son, Christopher, who also killed himself
The man who police say perpetrated a bow and arrow attack on a professor at Wyoming's Casper College was the victim's son.
Police in Casper, Wyo., say Christopher Krumm, 25, shot an arrow into the head of his father, James Krumm, 56 with a high-powered bow Friday while his father was teaching a computer science class at Casper College. James Krumm managed to wrestle with his son and gave time for about six students to flee the classroom. Authorities say both men died after Christopher Krumm stabbed himself and then his father. Before the classroom attack, police say Christopher Krumm fatally stabbed his father's live-in girlfriend, Heidi Arnold, 42, at the home she shared with James Krumm about two miles from campus. (.....)
http://www.cbsnews.com/8301-504083_162-57556763-504083/wyo-bow-and-arrow-attack-perpetrator-was-the-son-of-college-professor-killed-say-police/

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trois morts lors de ce drame, au Wyoming : il s'avère qu'avant de se suicider le fils a tué l'amie de son père, puis est allé dans la classe où celui-ci enseignait, pour lui tirer une flèche dans la tête. 

édit 4/12 : 
25-year-old Christopher Krumm was born on December 19, 1985
http://fandaily.info/slider/christopher-krumm-stabbed-his-fathers-girlfriend-heidi-arnold-and-used-bow-and-arrow-to-kill-his-father-james-krumm/

problème là également quant à l'exactitude de la date de naissance trouvée : 1985 donne 26 ans et non 25 comme indiqué dans tous les articles de presse...
mais en fait les éléments déclencheurs suspectés y sont, que l'on prenne l'année 1985 ou 1986 nous trouvons le jour critique émotionnel le jour du drame (vendredi 30 novembre) ou la veille, donc le jour à côté. autre élément de poids : l'approche de la date anniversaire.
les deux victimes sont dans l'une de leurs périodes critiques septennales.