“…Risk factors for suicidal behaviour during adolescence mainly include depressed mood, mental disorders, substance abuse, intrapsychic problems (i.e., a negative self-image, issues related to emotional control, anxiety, impulsivity, the presence of borderline personality traits, the presence of antisocial characteristics, the presence of the characteristics of narcissism), social isolation, loneliness, traumatic experiences involving, e.g., violence, sexual abuse, loss of significant others, as well as conflicted and dysfunctional family relationships, illness in the family, low economic status of the family, the family and social transmission regarding destruction (Adrian, Miller, McCauley, & Vander Stoep, 2016;Brausch & Gutierrez, 2010;King, Kerr, Passarelli, Foster, & Merchant, 2010;Kuhlberg, Peña, & Zayas, 2010;Miller, Rathus, & Linehan, 2007;Pilecka, 2005;Steele & Doey, 2007;Woźniak, Talarowska, Orzechowska, Florkowski, & Gałecki, 2013). The indicated factors increase the risk of violent behaviour in adolescents (Arim, Dahinten, Marshall, & Shapka, 2011;Crapanzo, Frick, & Terranova, 2010;Herba, Tranah, Rubia, & Yule, 2006;Manseau, Fernet, Hébert, Collin-Vézina, & Blais, 2008;Pajer, Leininger, & Gardner, 2010;Rulison, Gest, Loken, & Welsh, 2010;Undheim & Sound, 2010).…”