Who attacked Ken in Corrie?

As Ken comes out of his coma, he's shocked to discover that one of his own offspring could have been responsible. But who could it be?

Suffering from concussion, broken ribs and a punctured lung, Ken is shocked to learn that the police have launched an investigation into his attempted murder in Corrie and have placed the entire Barlow clan, (as well as Phelan and Sinead), under suspicion!

So who could have done the dirty deed and will an incriminating voice message put Peter in the frame?