Just before one of the Boston Marathon suspects and his brother allegedly gunned down a campus police officer, authorities say he exchanged text messages with a friend who’d become suspicious after seeing what looked like a familiar face on television, says the Associated Press. Dias Kadyrbayev, a student at the University of Massachusetts Dartmouth, texted college buddy Dzhokhar Tsarnaev, saying he looked like one of the bombing suspects. “Tsarnaev's return texts contained 'lol' and other things Kadyrbayev interpreted as jokes such as 'you better not text me' and 'come to my room and take whatever you want,’ ” said an FBI agent. Those texts led to Kadyrbayev and his roommate Azamat Tazhayakov, natives of Kazakhstan, who are charged with conspiring to destroy emptied fireworks and other evidence linking their friend to the April 15 blasts. Robel Phillipos, a Tsarnaev high school classmate, was charged with lying to investigators about a visit to his friend's dorm room to retrieve the items. A backpack taken out of the room wound up in a landfill, where it was discovered by law enforcement officers last week.