Moslems in Prison.

Apparently, 14.5% of prisoners in our jails are moslems. Apparently 4.8% of the population is moslem.
What do these statistics show with the ratio being about three to one? - Either:
1) There is an immense amount of racism in the system which jails disproportionate numbers of moslems or
2) Moslems are three times more likely to commit crimes or
3) The numbers of legal moslems has been supplemented by countless illegals or
4) A combination.
Having been part of the judicial system for a decade - as in the sentencing of women who commit crime - I believe that courts are far less likely to jail anyone from any ethnic minority. (Panic stations about being accused of sexism or racism.)