Dzhokhar Tsarnaev chose to write a note confessing his connection to the Boston Marathon bombings explaining why he and his brother Tamerlan made the two pressure cooker bombs as he thought he was dying when he was hiding out in a boat.

Dzhokhar Tsarnaev, 19, found a pen in the boat but no paper so it was revealed today that he wrote his message on an interior wall of David Henneberry’s boat that he used as shelter in Watertown.

Law enforcement sources told CBS that Dzhokhar Tsarnaev wrote that he “does not mourn” the death of his older brother Tamerlan because he is a martyr living in “paradise” and that he expected to join him there soon.

The note is a critical piece of evidence for police as it reiterates what Dzhokhar Tsarnaev said to them in the hospital after his arrest.

Aside from simply confirming his other statements, it could serve as back up for the eventual legal case against him because the reported confession to police came before Dzhokhar Tsarnaev was read his Miranda rights informing him of his right to remain silent.

After they were read, the suspect reportedly stopped talking to police, but now the note will serve as a handwritten confession.

Dzhokhar Tsarnaev found a pen in the boat but no paper and he wrote his message on an interior wall of David Henneberry’s boat that he used as shelter in Watertown

Dzhokhar Tsarnaev wrote that the bombings were retribution for the various American crimes against Muslims in Iraq and Afghanistan.

He equated the three people who were killed in the marathon bombings and the more than 250 others who were injured to “collateral damage” like the thousands of innocent Muslim victims of American wars across the globe.

“When you attack one Muslim, you attack all Muslims,” Dzhokhar Tsarnaev reportedly wrote.

CBS reporter John Miller pointed out that the note is just the latest piece of evidence that police are using in developing their theory that the Chechen brothers worked alone and were self-radicalized rather than being the “soldiers” for a larger group.

Investigators are still working to determine who else- if anyone- knew about the attack before it happened.

While the note is undoubtedly a boost for the state’s case against Dzhokhar Tsarnaev, who is now being held in the medical center of an area prison, it is hardly cut and dry.

Because police fired hundreds of bullets at the boat during their attempt to capture Dzhokhar Tsarnaev, the note is riddled with bullet holes.

Dzhokhar Tsarnaev has been charged with using a weapon of mass destruction and the note will certainly be used in the case against him.