The explosions that devastated the Boston Marathon were originally planned to go off on the 4th of July, according to the FBI.

Officials say the younger brother said that when the brothers finished the bombs sooner than they expected to, they decided to stage an attack earlier and decided on the Boston Marathon, on Patriot’s Day.

Officials say Tsarnaev also said the bombs were built in the house of his brother, Tamerlan.

Authorities had previously disclosed that explosive residue had been found there.

The manhunt following the attack resulted in the death of one of the suspects, 26 year old Tamerlan Tsarnaev.

His body was released to his family last night and has been removed to a funeral home. 

It's understood the funeral home must file a death certificate, which would make public Tsarnaev’s cause of death.

He was killed in a shoot out with police in the early morning hours of April 19th in the Boston suburb of Watertown.

His precise cause of death has remained unknown, since a death certificate or autopsy results have not been made public.

He was reported to be wearing an explosive device when he fell; reports also say his brother Dzhokhar ran over him when the younger brother was escaping in an S.U.V.

19 year old Dzhokhar Tsarnaev is in a prison hospital awaiting trial on terrorism charges.

Three people were killed and more then 200 were injured when two bombs detonated close to the finish line of the Boston Marathon on April 15th.