Multisystemic therapy (MST) is a home treatment program developed by Henggler in 1970 that focuses on family and community factors. The program aims to provide parents of young people in difficulty with tools to manage difficulties linked to their behavior. MST therapists work with the most difficult juveniles, both male and female, ages 12 to 17, who tend to have extensive criminal arrest histories. The MST focuses on many aspects contributing to the delinquent lifestyle, such as homes, families, schools, teachers, neighborhoods, and friends of juveniles. Psychoanalysts go to a child's home and work with parents to give them control over their children. MST research has identified particular risk and protective factors for each category that impacts a young person's life: family, peers, school and community. After identifying risk factors in all categories, a treatment plan is established, which focuses on strengthening existing protective factors in all categories and finding potential areas to generate new ones (Henggler, 1999 ). The criminological theory this program is based on is social learning theory, as the program focuses on the environment a young person is exposed to. The environment in which he finds himself creates tendencies to learn and acquire certain behaviors, whether positive or negative. DESCRIPTION OF BSFT: BSFT is a cost-effective, evidence-based, process-oriented, family-centered intervention program. Developed by researchers led by Szapocznik, the program works with children and adolescents between the ages of 6 and 17 who are at risk of developing or already displaying negative behavioral habits. The program was planned...... middle of article......BibliographyHenggeler, SW (1999). Multisystemic therapy: an overview of clinical procedures. Journal of Child Psychology and Psychiatry, Vol. 4, p. 2-10. Henggeler, SW, Melton, GB and Smith, LA (1992). Family preservation through multisystemic therapy: an effective alternative to incarceration of serious juvenile offenders. Journal of Counseling and Clinical Psychology, Vol. 60(9), p. 953-961. Szapocznik, J., Perez-Vidal, A., Coatsworth, DJ, Kurtines, WM, Schwartz, SJ, LaParriere, A., & Sansebastian, DA (2003). Effectiveness of brief strategic family therapy in modifying Hispanic adolescents' behavior and substance use problems. Journal of Family Psychology, Vol. 17, p. 121-133. US Department of Justice. (2000). Brief strategic family therapy. Washington DC: JuvenileJustice Bulletin, p.. 1-11.