I think if you start deciding that some people are less worthy of basic human rights than others you're on a very slippery moral slope. The way judicial systems retain their integrity is to treat everyone the same.
You only have to look at regimes where suspects of any crimes are treated automatically as being somehow lesser people to see that you end up with the most appalling abuses. Nazi Germany removed basic human rights from people it deemed to be not worthy of them; so too did Communist Cambodia, Iraq under Saddam, Kenya during the Emergency (and that was a British regime) ... the list is a long and shameful one.
So while I'm sure it rankles, it's very, very important for a society to remain mindful of the fundamental importance of treating everyone, regardless of what they're accused of, according to the same standards of decency.