very easy to run some blood tests or even breath tests on site to determine alcohol level in blood - but it wont matter as the local "aala qism ki police" wouldnt know how to use it or would have sold it for some extra money.
such accidents are common place in Pakistan - specially with rich folks because nawee and wadee gaddi means - 180 meter marna hai, iss se larkyan pataani hain aur unn ka mujra dekhna hai phir ayaashi karnee hai.