Personal account of horrifying crime

Need to audition three women and one man to give a voiceover of their eyewitness testimony of horrible crimes committed against children, for the protection of the ones involved in said crimes. It is too much for them. They have written their accounts down with a victim witness advocate and these recordings are needed to give them the authentic voice that was taken from them at trial; they will never be able to deliver this testimony. Obviously this Is a difficult subject matter, so please make sure your skill set includes dramatic performances. The case might fall apart without it.