Mountain out of a mole hill... the practice of "shackling" woman while giving birth is not solely the practice of Sheriff Joe Arpaio but in fact something that happens nationwide. I even found a HuffPo article for you.
Also: http://archive.is/wPREY
As part of an on-going investigation, Fusion has learned that 13 pregnant women were detained in an immigration detention center in El Paso between August and November of 2013.
Or is your "outrage" selective only towards Sheriff Joe Arpaio which used what apparently what a practice used at numerous detention facilities outside of Maricope?
Although the Bureau of Prisons instituted an anti-shackling policy in federal correctional facilities in 2007, state correctional facilities are still free to shackle inmates before, during and after child delivery if they see fit. Shackling during childbirth is illegal in 14 states and is against U.S. Immigration and Customs Enforcement (ICE) policy. But women being held for immigration-related offenses classified as “criminal offenses” can still legally be handcuffed to their hospital beds by state authorities in the 36 other states. Those women can also be denied the right to have a family member in the birthing room, or to hold their newborns for longer than 24 hours.