Complex sentence: This suggestion was put forward by author William Stewart, although he prefered Mary Pearcey as his chosen suspect,/and there is no evidence to conenct Dyer to the Jack the Ripper murders.
Split into simpler sentences: This suggestion was put forward by author William Stewart, though he prefered Mary Pearcey as his chosen suspect. So far there is no evidence to conenct Dyer to the Jack the Ripper murders.