PhD student who filmed sex attacks as 'souvenirs' convicted of drugging and raping 10 women Zhenhao Zou, 28, also kept a trophy box of women’s belongings Zhenhao Zou A PhD student who filmed his sex attacks as 'souvenirs' has been convicted of drugging and raping 10 women. 'Serial rapist' Zhenhao Zou kept a trophy box of women’s belongings and secretly filmed nine of his horrific attacks using a mobile and hidden cameras. ? He 'relied on drugs to incapacitate his victims' before carrying out his shocking crimes. The 28-year-old also used social media and dating websites to target his victims,…