Citizens of this land are innocent until proven guilty and as such, detaining/ arresting an alleged criminal does not require physically harming that individual in the process.
*Standard issue handcuffs can cut off circulation, cause bruising and permanent nerve damage. (http://en.wikipedia.org/wiki/Handcuff_Neuropathy)*
If handcuffs are to be used, they should only be used to detain people - not to injure them.
In a civilized society, justice is dealt through the process of law, NOT through unwarranted physical punishment.