Help Stolen IPhone! How to delete Everything from My iPhone From another Iphone?

My iphone 6 got stolen two days ago inside my house! (I have suspects) And the first Day the phone was turned on and then off! I was able to track it in my House before it turned off. How can i erase all my content and settings and Restart the iphone so that everything will be erase? Or what should i do?

I wanted to suspend my line but i'm thinking erase everything first!

Give your IMEI number to the cops and they will track it for you and do install Leo Privacy Guard, it is used to hide images and videos and also it is used to lock applications.