Which amendment deals with the rights of accused person including due process and double jeopardy?

Fifth Amendment

Explanation:

This amendment creates a number of rights which are relevant to criminal and civil proceedings. It provides the right to a grand jury in criminal trials, forbids "double jeopardy" and protects against self-incrimination.

what are local authorities doing to fix the problem

explanation:

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.