The man charged with shooting a convenience store clerk in the back of the head during a Sunday morning robbery in Tupelo more than two years ago has avoided the death penalty by pleading guilty.

BOSTON, Massachusetts (CNN) -- A 22-year-old medical student suspected of killing a woman he may have met through a Craigslist online ad was arraigned Tuesday and will be held without bail.

Negasi Zuberi, 31, was sentenced Friday in federal court in Medford ... pointed a Taser at her and placed her in handcuffs and leg irons before putting her in the back of his vehicle.