How did Mansa Musa organize and protect his epire?

Who killed imam musa kazim?

Haroon the Abbasid Caliph sent him to different prisons and asked the boss of prison to poison Imam and kill him but none of them accepted this. finally Haroon sent Imam to prison of a jew called Sendi Ibn Shahik. he poisoned Imam by order of Haroon and Imam died for poison. Sendi make some poisoned dates and brought for Imam to eat. Imam ate them and got sick. when Imam was sick Sendi called some of shia Muslims and said them: look at your Imam he is healthy. but Imam said them: no by God, he poisoned me.