The mystery of Ketan's murder is hidden in Chetan's pants? Will he find the कट.पोलिसांना evidence of Sian's murder?

The mobile phone was with Siya. So what does Chetan's custody have to do with this? Did the accused practice murder? It is said that he wants to visit the spot. So why didn't he go in seven days? This question was raised by Chetan's lawyer.