That is wishful thinking I am afraid. There are dozens of suicide accounts that reference Murdoch specifically by name:
Suicide Witnesses| William Murdoch
OK. Since you quoted that witness account, let us look at it a bit more closely. Remember that it was dark and the shooting/suicide incident very likely took place around 02:15 am in the vicinity of Collapsible A.
Also, Murdoch and Wilde were both involved in launching if Collapsible C at around 01:58 am and the former then went to try and free Collapsible A, probably working with Moody.
'Witnesses' from your list who 'saw' and specifically named Murdoch as the officer committing suicide:
Charlotte Collyer - Rescued on #14 launched at 01:25 am
Robert Daniel - Rescued on #3 launched at 12:55 am
Mary Davis - Rescued on #13 launched at 01:40 am
Thomas Dillon - Rescued on Lifeboat #4 launched at 01:50 am
"
Max Dittmar-Pitmann" - Non-existent
Frederick Harris - Rescued on Lifeboat #14 launched at 01:25 am
George McGough - Rescued on #9 launched at 01:30 am
"
QM J R Moody" - Non-existent
Oscar Olsson - assuming this was actually O
scar Johansson, he was indeed rescued on Collapsible A. But read this excerpt from the article on your link:
“We saw the water come up and up until it almost reached him [Murdoch]. Then we heard a pistol shot.
Many people thought he had shot himself.” Bill Wormstedt writes regarding this that the “fragment above appears to indicate that
Olsson did not actually see the suicide” making it similar to Eugene Daly’s account, who said that “there was another shot, and I saw the officer himself lying on the deck. They told me he shot himself, but I did not see him.” Except in the case of Olsson, he does not see evidence of a suicide, but hears a “pistol shot. Many people thought he had shot himself”.
Godfrey Peuchen - Rescued on #6 launched at 01:10 am
"
Albert Smith" - Non-existent and in any case the article claims he was rescued on #11 launched at 01:35 am
Thomas Whiteley - There is uncertainty about on which lifeboat Whiteley was rescued, but the relabilty of his witness statements can be easily gauged by two of his other claims - one, that he jumped overboard and swam for 5 hours before being pulled on board a lifeboat, but not before someone hit him on the head with an oar; two, that he swallowed so mach water that doctors later had to remove his stomach and replace it. Sounds like that knock on the head did its job.
Charles Williams - Rescued on #14 launched at 01:25 am
Charles Whilems - Rescued on #9 launched at 01:30 am
"
Jack Williams" - Non-existent.
As one can easily see Oscar Olsson/Johansson (who did not actually see the shooting himself but simply heard a shot) apart, the latest lifeboat on which a witness who named Murdoch as having shot himself was #4 and Thomas Dillon. #4 was launched at 01:50 from the port side, almost 25 minutes before the shooting incident. Almost all the crew manning lifeboats were worried about suction effects as the
Titanic went down and so rowed away into the darkness as fast as they could. Therefore, it is a fair bet that
all of those boats were some distance away from the
Titanic when the shooting took place, certainly way too far to be able to discern any faces or details in the chaos that would have been present on the boat deck by then.
Now let us compare the above statements with witness accounts from some who were rescued on Collapsibles A or B, who would have been close enough to have witnessed the incident.
John Collins - was near #A and later rescued on #B. The article says that he described the officer who shot himself as the "Senior Mate"; in fact, he specifically said "The one next to the Captain". Collins know Murdoch by sight as the Scots Officer and reported seeing him knocked overboard. I have spoken to both Alice Braithwaite (the one who first mentioned the report and Collins' daughter Mary McKee about this.
Eugene Daly - Was on board the
Titanic till the last moments and was rescued on Collapsible B. He reported an "officer" shooting himself but did not name him.
Peter Daly - Rescued on Collapsible A. Reported an unnamed 'officer' shooting himself.
George Rheims - Rescued on Collapsible A. Reported an unnamed 'officer' shooting himself.
Carl Jansson - Rescued on Collapsible A. Reported the 'chief officer' shooting himself.
Richard Norris Williams - Rescued on Collapsible A. Reported Captain Smith' shooting himself.
Therefore, none of the surviving witnesses who were actually in the vicinity of the shooting named Murdoch. Eugene Daly, Peter Daly and George Rheims saw an unnamed officer while John Collins and Carl Jansson (neither of whom were on the
Olympic, where Murdoch had been the Chief Officer) identified the man as the Chief Officer. Richard Williams thought it was Captain Smith.
Therefore the "wishful thinking" does have some substance to it
