Multnomah County recently put a magnifying glass to its jails.

What officials found, using a grant from the John D. and Catherine T. MacArthur Foundation, wasn't entirely shocking: African-Americans are six times more likely to be in jail than their white peers.

A host of factors contribute to the disproportionality.

Blacks are 4.1 times more likely than whites to have a probation violation result in a jail stay, according to a county report.

Blacks are 7.5 times more likely than whites to have a parole violation result in a jail stay.

Read the full report here.