The Supreme Court on Wednesday upheld the conviction of Santosh Kumar Singh in the 14-year-old Priyadarshini Mattoo rape and murder case but reduced the death sentence to life imprisonment, saying certain things were in his favour. A Bench comprising Justices H S Bedi and C K Prasad said, the conviction is maintained. However, the Bench said, to their mind, certain things are in favour of appellant and they are converting the punishment of death sentence into the life imprisonment.