Phillipos tells Kadyrbayev to put the news on when he gets home, because one of the Marathon bombing suspects looks familiar.
Kadyrbayev later turns on the TV and notices one of the suspects resembles Dzhokhar Tsarnaev, according to an FBI affidavit. Kadyrbayev's lawyer, Robert Stahl, later disputes that assertion -- saying his client didn't immediately recognize Dzhokhar Tsarnaev as a possible bombing suspect and did not know that his friend allegedly was involved in the attack, saying "his first inkling came much later."
Kadyrbayev texts Dzhokhar Tsarnaev to tell him he looks like one of the bombing suspects. His friend's response includes "LOL" -- Internet slang meaning laughing or laugh out loud -- and other things Kadyrbayev said he interprets as jokes like, "You better not text me" and "Come to my room and take whatever you want."
6 p.m. onward: Kadyrbayev later tells investigators that, between 6 p.m. and 7 p.m., he, Tazhayakov and Phillipos meet on the University of Massachusetts-Dartmouth campus and go to Tsarnaev's dorm room.
Tazhayakov claims that it was around 9 p.m. when Kadyrbayev texted him alerting him to the "news" and their friend's possible involvement in the Boston blasts. The two meet at the New Bedford apartment they share, at which time Kadyrbayev shows Tazhayakov photos broadcast by CNN of a suspect he believes is their friend Dzhokhar Tsarnaev, according to Tazhayakov's account to investigators.
It's at this time, Tazhayakov later recalled, that Kadyrbayev texts Phillipos so they can all meet at Dzhokhar Tsarnaev's dorm room.
Dzhokhar Tsarnaev's roommate lets all three young men into the room, telling them that Tsarnaev had left a few hours earlier. Just before they go in, Tazhayakov says that Kadyrbayev showed them a text message from Tsarnaev saying, "I'm about to leave if you need something in my room take it."
"When Tazhayakov learned of the message, he believed he would never see Tsarnaev alive again," a federal affidavit states.
While watching a movie, the three -- Kadyrbayev, Tazhayakov and Phillipos -- spot a backpack with fireworks that have been opened and emptied of powder. Phillipos tells investigators that he noticed about seven tubular fireworks, each between six to eight inches long, in the backpack.
According to Tazhayakov's account in an FBI affidavit, Kadyrbayev also finds a jar of Vaseline that he thought Dzhokhar Tsarnaev used "to make bombs."
The same affidavit states that, at that time, Kadyrbayev knew Dzhokhar Tsarnaev was involved in the Marathon bombing -- an assertion that his lawyer denies.
The young men take take the backpack out of the dorm room, as well as Tsarnaev's laptop.
Around 10 p.m.: Kadyrbayev, Tazhayakov and Phillipos take the backpack and computer to the New Bedford, Massachusetts, apartment shared by the first two young men. There, they watch news reports that broadcast photos of the man who would later be identified as their mutual friend, Dzhokhar Tsarnaev.
Phillipos says later that Kadyrbayev and Tazhayakov both "started to freak out, because it became clear from a CNN report that we were watching that (Dzhokhar Tsarnaev) was one of the Boston Marathon bombers." He adds he did not understand much of what the roommates, Kadyrbayev and Tazhayakov, said afterward because they talked mostly in Russian.
According to Kadyrbayev, the three collectively decide to throw away the backpack and fireworks because they don't want Dzhokhar Tsarnaev to get in trouble. Kadyrbayev puts them in a black trash bag, which he tosses in a dumpster outside his apartment.
In federal documents, Tazhayakov gives different timing, as to when the backpack was discarded. He said it happened around 6 a.m. the next day, after he, Kadyrbayev and Phillipos see news reports that identify their friend, Dzhokhar Tsarnaev, as one of two Boston attack suspects. He said that Kadyrbayev decided -- and Tazhayakov agreed -- that they should toss the backpack.
Phillipos said Kadyrbayev asked him about 11 p.m., and he responded, "Do what you have to do." By the time he woke up after a two-hour nap, Phillipos recalled, the backpack was gone. After waking, Phillipos stays up until 4 a.m. Friday watching television with Tazhayakov.
11 p.m. Massachusetts Institute of Technology police officer Sean Collier, 26, is shot dead on the school's Cambridge, Massachusetts, campus -- a killing authorities later link to the Tsarnaevs.
Friday, April 19
Early hours: Police say the two suspects hijack a car at gunpoint in Cambridge, Massachusetts, taking the driver as a hostage. One suspect tells the driver they are the Boston Marathon bombers, and the suspects talk openly about heading to New York.