Weatherfield villain Frank Foster (Andrew Lancel) is about to get his comeuppance as he is found dead next week, but his long list of enemies means that police will be left baffled over who the culprit was.
Carla, played by Alison King, is now William Hill's 2/1 favourite to be revealed as the killer once the storyline reaches its dramatic conclusion. The no-nonsense factory boss has the biggest motive as Frank sexually assaulted her last year.
Kym Marsh's character Michelle, who also hates Frank, follows closely behind with odds of 4/1, while Peter Barlow (Chris Gascoyne) is at 5/1.
Kevin and Sally Webster (Michael Le Vell and Sally Dynevor) are both at 8/1, while unlikely suspect Kirk Sutherland (Andrew Whyment) and dead character John Stape (Graeme Hawley) also feature on the bookmaker's list with respective odds of 10/1 and 20/1.
William Hill spokesperson Rupert Adams commented: "Carla has her reasons to off Frank, but the dark horse has to be Kirk. Often in the background during Corrie, maybe he has been plotting a murder in his downtime."
The odds in full are as follows:
2/1 - Carla Connor
3/1 - Anyone else
4/1 - Michelle Connor
5/1 - Peter Barlow
8/1 - Sally Webster
8/1 - Kevin Webster
10/1 - Kirk Sutherland
20/1 - John Stape
Carla, Kevin, Michelle, Peter and Sally are the five characters who have been officially named as suspects by Coronation Street bosses in recent days.
Coronation Street airs Frank's final episodes on Monday, March 5 - but the culprit behind his demise will not be revealed until some time afterwards.
> Coronation Street confirms Frank Foster death plot
> Coronation Street confirms five Frank murder suspects
> Coronation Street Alison King: 'Carla easily capable of killing Frank'
> Coronation Street Frank killer could be anybody, says Andrew Lancel
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