Coronation Street fans think they 'know' what DI Costello is trying to hide after it was revealed he set Lisa Swain up with a fake Tia Wardley.

Lisa and DC Kit Green's boss has been sparking suspicion over his involvement in Lisa's late wife, Becky's, death as he's been keen to avoid them both digging into her death, in the line of duty, and what she was investigating before her demise.

Those watching have been led to think that Lisa believes that Logan Radcliffe and his brother, Matty, had some kind of involvement in Becky's, death, which came while being investigated for corruption.

And viewers of the ITV soap will recall that Tia Wardley's name was first heard when, earlier this year, Lisa reluctantly returned to her therapy sessions, while her girlfriend Carla Connor went behind

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