Now you're alarming me. You don't know for certain this man is guilty, yet because he is charged with a most heinous crime, you consider it better that he be executed summarily - possibly crucified (which is one of the worst possible ways of dying, and probably unconstitutional, being "cruel and unusual") - rather than run the risk of him escaping before trial.
Maybe he fled because he knows he has hundreds of unpaid parking tickets. (That is flippant, but I said it demonstrate that you can't even assume guilt when a person escapes from custody.) It seems to me that you've turned the Blackstone Ratio on its head: better that ten innocents suffer than that one guilty person escapes.
TYWD