Final Analysis

As you can see, some of the ‘evidence’ of an officer’s suicide is of dubious nature, at the least.  The survivor’s accounts disagree with each other, and some of the survivors couldn’t have seen what they said they did.  However, the dubious nature of some of the accounts does not automatically disprove them, either.

But we do see some consistency!  Many of the accounts above, refer to events on the starboard Boat Deck, not long before the Bridge area dipped under.  There are two first hand witnesses, both of whom would have been in the correct place to witness a suicide, and both of whom gave multiple accounts of the shooting/suicide: Eugene Daly and George Rheims.  Their statements, coupled with those of other people who gave press accounts claiming to have witnessed a suicide, and were in the correct position to have witnessed it (Dorking, Jansson, etc.), strongly suggests that the story may indeed have a basis in fact.

In the following section, the possible motivation of the various ‘suspects’ is addressed.  Please keep in mind – this is speculation only!  There is no way to actually ‘know’ what was going through these men’s minds in the final stages of the sinking.

Certain motivations were common to all these men – the imminent sinking of the ship, and death of most of those still on the ship, including the officer himself.  Also – was this unknown officer involved in any passengers being shot, as some of the accounts say?

Captain Edward John Smith
 As shown above in some of the accounts themselves, Captain Smith was mentioned as having shot himself at the end.  Other accounts have Smith diving overboard from the bridge, or even going inside the wheelhouse (as he did in the Cameron movie).

Possible Motivation
Captain Smith was the man ultimately responsible for the Titanic – and her passengers.  Regardless of whether he was on the bridge during the collision, he was responsible.  Even though he was due to retire soon, the sinking of the Titanic would be a very large blemish on his reputation.
Location
A number of accounts have Smith on the forward areas of the Boat Deck, near to the Bridge, not long before she dipped under.  Bride’s account even has him diving off the Bridge as she dipped under.  He seems to have been close to the areas usually associated with an officer’s suicide.
The Means
Captain Smith was one of the officers who went to the Chief Officer’s cabin when the revolvers were brought out and distributed (Lightoller’s Titanic and Other Ships).

Chief Officer Henry Wilde
 In all the survivor accounts available at this time detailing an officer’s suicide, the very few mentions of Henry Wilde by name are not very convincing.  The above listed account by "Unknown" could easily have been a fabrication by a reporter, the mention of Wilde in the Hyman headline may also be a reporter's fabrication, as Hyman himself does not mention Wilde in the account.  Yes, the name “Chief Officer” is mentioned in a number of accounts, but as detailed earlier, the fact is that not all survivor’s meant Wilde when using that term. Any references to the Chief Officer shooting himself, apply equally as well to Murdoch as they would to Wilde.

Possible Motivation
It has been suggested that Wilde could have been despondent over the death of his wife, and that the disaster of the Titanic pushed him over the edge into suicide.  However, the death of his wife and two sons had occurred almost a  year and a half before he shipped out on the Titanic.  Wilde also had 4 surviving children waiting for him at home, depending on him for continuing support.

Second Officer Lightoller, in the article he wrote for The Christian Science Journal (Vol. XXX, 10/1912, No. 7), stated "[I] was on my way back on deck again when I heard Wilde say, 'I am going to put on my life-belt.'"  At this time that Lightoller saw Wilde, it does not appear that Wilde was suicidal, although this could have changed in the last minutes.

Location
When last seen, Wilde was helping load the forward boats – he was there for both Collapsibles C and D.  Since C was lowered slightly before D, Wilde would have had to cross over to the port side.  No eyewitness testimony has been found which shows he crossed back to the starboard side.  However, it does seem very likely that he would have stayed in the bridge area, and continued trying to help up until the end.
The Means
Wilde probably did have a weapon that night, in fact, it was Wilde himself who asked for the weapons to be brought out and distributed.

First Officer William Murdoch
 Murdoch is usually the officer mentioned, by name, when detailing who may have shot himself as the ship sank.  This in itself does not ‘prove’ it was Murdoch; however, it does lend a bit more weight to the assertion, than it does to the other suspects. However, any references to the Chief Officer shooting himself, apply just as well to Murdoch as they would to Wilde.

Possible Motivation
Murdoch was the man directly in charge of the ship in the hours leading up to the collision with the iceberg.  As such, he was responsible for the ship and all its passengers during that time.  His career at sea was effectively over, if he survived the disaster.

If ‘the’ iceberg was not the first to be spotted that night, as brought out in George Behe’s Titanic: Safety, Speed and Sacrifice, then Murdoch was also responsible for not slowing down, in direct violation of the posted orders from the White Star Line, that “Time must be sacrificed or any other temporary inconvenience suffered, rather than the lightest risk should be incurred.”  He also did not follow Captain Smith’s final orders (passed on from Lightoller), to "If in the slightest degree doubtful, let me know."

Like Wilde, Murdoch also had family at home dependent on him - his wife Ada.  Ada, though having lived in England for a number of years, was actually from New Zealand.
Location
Murdoch was right where many of the suicide accounts place the shooting – at the forward lifeboat station on the starboard side.
The Means
Murdoch was one of the officers who could have received one of the revolvers when they were passed out in the Chief Officer’s cabin earlier that evening.

Purser Herbert McElroy
Though not noted in 1912, McElroy was seen on in the general area the suicide supposedly happened in, and was also seen to fire a revolver (according to Thayer, 1932 and 1940).  Other than that, there is no reason to suppose he would have shot himself.

Possible Motivation
Other than realizing the imminent sinking of the ship, and the death of many on board the ship, including himself, McElroy had no special reasons to commit suicide.
Location
According to Jack Thayer’s 1940 account, McElroy was helping to load Collapsible C from A deck, shortly before the bridge dipped under (no 1912 accounts exist placing McElroy in this area, however).  Thayer's 1932 account also places McElroy on the forward starboard side of the ship.  If this actually was McElroy (see William Ward's statement, under "Why were officers sometimes mis-identified?" above, it seems likely that he would have remained in this same general area, but transferred up to the Boat Deck, to help with Collapsible A.  However, this is speculation only – there have been no reports of McElroy being seen after this sighting at C.
The Means
It is unknown how or why McElroy would have had a weapon in his position.  He was not part of the group that was in the Chief Officer’s cabin when revolvers were handed out, and his position as Purser would not have made it likely for him to have a weapon.

Of all the people who are thought of as possible suicides, McElroy is the only one whose body was recovered.  The Mackay-Bennett picked the body up on April 23rd (a week after the disaster).  Listed as #157, the body was buried at sea.

No statement was ever released saying McElroy’s body did or did not have a gunshot wound, though Sinking of the Titanic by Jay Henry Mowbray mentions a statement attributed to Capt. Lardner and the crew of the Mackay-Bennett that "not one of the bodies that were recovered had any pistol shots".

Sixth Officer James Moody
Really, the only ‘evidence’ for suspecting Moody as the suicide victim, is that he was seen on the forward starboard boat deck, at around the same time as the supposed suicide.

Possible Motivation
Moody had no special reasons to kill himself that we know of, other than realizing he was likely to die in the freezing water as the ship sank.
Location
According to Sam Hemming's account at the US Inquiry, Moody is reported to have been helping at Collapsible A as the bridge dipped under – the same place as Murdoch .
The Means
He was not part of the group that was in the Chief Officer’s cabin to receive a weapon.  There is no evidence that Moody did have a gun that night, though it is possible that a gun was passed to him by Wilde or someone else.  This is not proof that he had one, however.