Kasab was a school dropout and the reason behind it was poverty. He fought with his parents and left home in 2005. He first started his career with small criminal jobs and then to robberies. He accidentally met the activists of LeT and joined Lashkar-e-Toiba after being inspired by the speech of Hafiz Mohammad Saeed, the Lashkar chief. He had the training of Marine warfare technique at a remote camp in Muzaffrabad, a part of Pakistani Kashmir. He was among the ten people who would go on to carry out the 2008 Mumbai attack, which killed 166 people.
While Kasab was captured alive, all his other accomplices were killed in the attack. The trial which had sentenced to death the 25-year-old on 6th May 2010, which was later unveiled by Bombay High Court last year. The Supreme Court upheld the death sentence and his mercy petition was eventually rejected by the president.