The Massachusetts Arrest Screening Tool for Law Enforcement (MASTLE) is an objective screening tool validated in Massachusetts jurisdictions that assesses the likelihood a youth taken into police custody for a criminal offense will be arrested again or will fail to appear for arraignment. This information will allow police supervisors and commanders to make appropriate pre-processing decisions based on the presence of youths’ risk factors; such as, whether to hold youth in pre-arraignment detention at the police station or to divert youth away from formal arrest. For more information on this screening tool, please download our MASTLE Brief and MASTLE Executive Summary. If you would like to receive a free copy of this screening tool along with the user's manual, please complete our online request form (note: this form only works with Firefox and Chrome web browsers). If you are using Internet Explorer, please download this request form and email it to LawPsych@umassmed.edu.

Click here if you wish to request training on the MASTLE or technical assistance for implementing this screening tool. Costs will vary based on needs.