He became the first Indian pugilist to qualify for next year's Beijing Olympics after he defeated European silver medallist Shahin Imranov to advance to the quarter-finals of the World Boxing Championships in Chicago.
Lakra, who has earned a berth for Beijing Olympics, lost 6-17 to Asian bronze medallist Yang Li in the feather weight category at the University of Chicago's UIC Pavillion on Friday.
Jai Bhagwan became the third Indian to come within one victory of Olympic qualification by advancing to the pre-quarterfinals of the World Boxing Championship.
The assailant, Donald Thurman, 26, was arrested Sunday from a Chicago metro station.