The cafe owner – who is played by actor David Neilson in the ITV soap – will find himself as the prime suspect in Lauren Bolton’s mysterious disappearance.
Viewers know Lauren vanished without a trace last month but this week Roy will be caught seemingly trying to clean up evidence from the crime scene.
And it will lead to him being accused and arrested for her murder.
Actress Vicky Myers, who plays DS Swain, has opened up about the shocking moment the police detective arrests gentle Roy.
“Roy ends up in the frame because Swain interviews Bobby and there are certain elements of that conversation that raise suspicion,” she told The Sun.
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“Then Swain goes ahead and goes to interview Roy. Because of his honesty and slight vulnerability, she sees that he’s almost too good to be true.
“It’s quite cynical, as she’s suspicious over Roy’s support for Lauren and she wonders: ‘Do people really genuinely go and help someone and be generous towards them like this?’ It raises suspicion and it goes from there, really.
“There is evidence to support the theory. Once Swain and Tinker go to Lauren’s flat, they’re made aware that there’s potentially some blood on the curtains.
“Scenes of Crime Officers are brought in to investigate and it’s confirmed – and there’s also human tissue. So it escalates into that, really.”
Vicky added: “Swain doesn’t know Roy and she doesn’t care about Roy.
“Regardless of what anyone else says to her about him, she deals in facts and she’s got to get to the bottom of this.
“Swain very much sees herself as ‘the victim’s voice’. So she’s working at it from Lauren’s perspective. She wants to know what’s happened to her.
“Regardless of what anyone else says about this much-loved character on the Street, she doesn’t care about that. That’s of no interest to her whatsoever.”
The actress also admitted that Swain won’t be swayed by the community’s reaction to Roy’s arrest.
She said: “The evidence is there to suggest it. But I think for Swain, she’s never met anybody like Roy before and it makes her feel quite uncomfortable.
“But it’s not really for her to decide. Swain’s job is to collate all of the evidence, corroborate everything and pass it onto CPS and then court.
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“So she’s just got to do her job and make sure she can get enough evidence as she possibly can.
“Regardless of what other people are saying and if they’re championing Roy’s corner, that’s her job and she takes it seriously.”