A midwife could have committed the crimes

One of the most perplexing elements of the Ripper's crimes is the question of how the killer managed to enter into and escape from each crime scene without being identified by any witnesses. A man leaving his household late at night, wandering the streets, being covered in bloodstained clothes, and possibly being found by a body would be very likely to arouse suspicion. A woman, especially a midwife, would have had a much easier time escaping notice while committing the Ripper's killings. A midwife would have had the knowledge of anatomy and basic surgical skills needed to perform the mutilations committed by Jack the Ripper. Furthermore, in London in 1888 it would not have been unusual for a midwife to travel the streets at any hour, even with clothes covered in blood, due to their responsibilities in attending to childbirth.