Conversation so far:
when does the boston bomber get put to death
Dzhokhar Tsarnaev was sentenced to death on June 24, 2015.
Where is Dzhokhar Tsarnaev incarcerated?
On June 25, 2015, Dzhokhar Tsarnaev was transferred to the United States Penitentiary, Florence High in Colorado; as of July 17, he had been transferred to ADX Florence.
What were the charges that Dzhokhar Tsarnaev was convicted of?
Dzhokhar Tsarnaev was convicted of planting pressure cooker bombs at the Boston Marathon on April 15, 2013, along with his brother Tamerlan Tsarnaev.
Were there deaths in the Boston Marathon bombing?
Three people were killed in the Boston Marathon bombing.

Question: How was the bombers captured?
Self-contained rewrite: How was Dzhokhar Tsarnaev captured?