Explain and explore how unqualified “expert witnesses”, psuedo-science, bad scie

Explain and explore how unqualified “expert witnesses”, psuedo-science, bad scientific technique,
unproven scientific theories, contominated forensic evidence etc has contirbuted to worngful convictions.
List some casues and possible corrective action.
Identify any legal changes or court cases that improved or reduced the problem.
One good example of “junk science” is forensic odontology or bite mark analysis, or Dr. Michael West, identified in “the innocence files” documentary.
Instuctions must be followed. Use Native English speaking writing style. Ensure work is graduate level.