EastEnders' executive producer Dominic Treadwell-Collins has promised that there is an "even bigger" story ahead for the Beale family now that Bobby's guilt has been revealed.
Thursday night's 35-minute flashback episode (February 19) saw the surprising revelation that Bobby killed his half-sister Lucy on Good Friday 2014, resolving a whodunit mystery which had run for 10 months.
Speaking afterwards in a live EastEnders Facebook stream, Treadwell-Collins was asked whether he ever had other characters in mind to be the killer.
He replied: "There was one other suspect for about a day, but then it didn't feel right. We always said that this story had to come from the heart, and with this, it's the start of a whole big new story for the Beales.
"We kept on going on about [2003 novel] We Need to Talk About Kevin - we need to talk about Bobby! So actually this is the beginning of an even bigger story for the Beales. We've got to keep going!"
Treadwell-Collins confirmed that young actor Eliot Carrington, who plays Bobby, was made aware of his character's guilt on Monday evening (February 16) before the BBC soap's Live Week began.
Carrington responded positively to the twist, pointing out that it was natural for Bobby's adoptive mother Jane to cover for him.
Treadwell-Collins said: "Most people didn't know. We had to keep it quiet because things leak. We always say that if someone tells you a secret, you always tell one person. I always tell one person! We couldn't afford that.
"We told [Eliot] on Monday. We told his dad before that obviously and checked that it was okay, but we knew that it was always going to be Bobby. But when we told him... he's so clever, Eliot! He said, 'Oh God, that makes sense. Of course Jane had to do it because otherwise Bobby would go to juvey'. He's a clever little boy!"
Treadwell-Collins also revealed that EastEnders' story producer Alex Lamb was the first person to suggest that the culprit should be Bobby.
"My idea was Jane and then Cindy," he explained. "And then Alex Lamb said Bobby. We were at story conference and we went up to my hotel room - [series producer] Sharon [Batten], Alex Lamb, [script producer] Manpreet Dosanjh and I.
"We sat there and came up with it and we jumped up and down! If you look at the pieces now, Jane took Bobby away! We cleverly, I hope, seeded everything."
The aftermath of the big reveal will be explored on screen on Friday as EastEnders airs a 30-minute live episode.