Brawls between students have become a phenomenon that occurs quite often in various regions of Indonesia. Brawls usually occur due to high rivalry between students from two or more schools. This rivalry often boils down to mutual attacks or physical clashes. One of the main causes of high rivalry between schools is the existence of school egos and student gangs. Student gangs in each school usually also want to show their existence and strength by making trouble. This is a form of introducing teenagers that involves students which is increasingly occurring.
The research method used in this study is an empirical method that is descriptive, explaining and describing completely the situation that occurs in the community by conducting research directly in the field and analyzing the existence of behavior that deviates from the norms that are not implemented in the environment. The source of research data is in the form of primary legal materials and secondary legal materials. Data collection methods and interview techniques.
Factors that affect the cause of violence between students in the city of Pematang Siantar carried out by students usually occur due to disputes between schools and other schools, lack of affection from home (parents) or from the surrounding environment, and even from the influence of friends.  Another factor is the influence of social media, because this social media can be very influential and accelerate the dissemination of information and even mobilize groups. Regarding the sanctions that can be imposed on minors who commit criminal acts are in accordance with what is regulated in Law Number 12 of 2012 concerning the Juvenile Criminal Justice System, the first effort made by the Pematang Siantar Police is to seek dissolution first, Then if the child commits a minor or serious crime, the police will seek deliberation by involving the perpetrator and his parents/guardians, victims and/or parents/guardians. In this process, the police will offer diversion or peaceful efforts so that the case does not reach the court.

Projects run by a company or organization often fail or do not achieve the planned goals, this is not uncommon due to errors in carrying out the project., Regarding the existence of financial losses of the State, in the legal dimension of the State administration is in principle oriented towards the recovery of these losses, and can be applied cumulatively with other sanctions, namely: administrative, criminal and civil witnesses. The purpose of this study is for the Mechanism for Returning State Financial Losses Due to Failed Projects. This type of research is a normative research approach to legislative research (Statute Approach) and through primary data by processing data from primary legal materials, secondary legal materials, and tertiary legal materials. Based on the results of the study, if the settlement of regional loss cases by deliberation for consensus is not reached, then the local government should be able to do other ways in accordance with the provisions stipulated in the Presidential Regulation on Government Procurement of Goods/Services, namely through arbitration, alternative dispute resolution or court in accordance with the provisions of laws and regulations. Alternative dispute resolution is an out-of-court dispute resolution institution through procedures agreed upon by the parties, consisting of negotiation, mediation, conciliation, and expert assessment. Therefore, local governments should seek to recover regional losses by means of asbitrase and alternative dispute resolution first, before handing over the case of regional losses to APH.