The correct answer to this open question is the following.
The situation is that a woman has been accused of a crime but she says that she was nowhere near the scene of the crime. Her friends who were with here refuse to appear in court as witnesses because they are afraid that they will be accused too.
The women's counsel can use the 6th Amendment's witness clause to support her case in that the accused has the right to force its witness or witnesses to go to trial to declare. The accused has the right to confront the witnesses and to get a fast trial with an impartial jury.