"Sorry to my brothers for what happened during the 14 years of war in Liberia ... I will meet my obligation no matter what it would be"
Charles "Chuckie" Taylor
The charges said "Chuckie" Taylor allegedly ordered and in some cases carried out acts of violence between April 1999 and July 2003.
One victim was allegedly placed naked in a pit as stinging fire ants were shovelled over his body.
He was also alleged to have tortured his victims with melted plastic, electric shocks, scalding water and beatings with "sharp metal rods".
"Chuckie" Taylor also personally shot several men to death at a bridge checkpoint and ordered one man beheaded with a large knife, witnesses said.
His father is currently facing trial for war crimes by the United Nations-backed Special Court for Sierra Leone in The Hague, Netherlands.
Appearing in the Miami, Florida court shackled and dressed in a brown prison jumpsuit, also sporting a long beard and mustache, Taylor asked forgiveness from his victims.
"Sorry to my brothers for what happened during the 14 years of war in Liberia ... I will meet my obligation no matter what it would be," he said before hearing his sentence.