Mr. HUNTER asked the Home Secretary whether he was prepared, in the case of the Whitechapel murders, other than that of the woman Kelly, to offer a free pardon to any person not being the actual perpetrator of the crimes.
Mr. MATTHEWS. - I should be quite prepared to offer a pardon in the cases of the earlier Whitechapel murders if the information before me led me to believe that it would assist in the detection of the murderer. In the case of the woman Kelly there were certain circumstances which were wanting in the earlier cases, which made it more probable that there were other persons, at any rate after the crime, who had assisted the murderer.
Yeah, I thought the police might have assumed that the man seen outside Crossinghams could have been a lookout. But Matthews says - after the crime.
So its possible it might be the old somebody must know something. Why this is different from the other crimes it is difficult to say. Maybe the period killing Mary, maybe they thought that the perpetrator might be excessively bloodstained. or maybe there was more than the heart missing from Mary and the police thought it might be difficult to conceal whatever he took. It's possible with the locked door fiasco and Mary being killed in her room they may have assumed the killer knew her.