Want to know

Can anyone plz tell me about a bl in which there are two boys one got murdered or commit suicide dont kniw but another one accused for it and put in the jail.the boy who commit suicide has an elder brother who quite abusive and there is another man who is cop and has some kind relationship with brother and another man who wear traditional clothes
And dead boy learnt another language for the boy from his teacher and wrote letter for the accused boy in his language