A man brutally killed his friend at Malkajgiri area. According to police sources 30-year-old Samuel who was a private employee died in his friend’s attack. Yesterday night Samuel had drinks along with his two friends Chandrasekhar and Prabhakar. Prabhakar went home late at night. Samuel and Chandrasekhar were still having drink. Both had altercations following which Chandrasekhar stabbed Samuel to death.