Suspect made no secret of Tsarnaev friendship, boss says ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Jane Flavell Collins/Associated Press photo In this courtroom sketch, Khairullozhon Matanov appeared in federal court before a magistrate judge. facebook An undated photo of Khairullozhon Matanov. Facebook Matanov was arrested by federal authorities. Wendy Maeda/Globe Staff Khairullozhon Matanov, 23, lived at an apartment complex in Quincy. Wendy Maeda/Globe Staff Ahmed Goutay said he knew Khairullozhon Matano from the Islamic Center of New England mosque in Quincy, where both studied. Wendy Maeda/Globe Staff Matanov frequently waited for fares outside Braintree MBTA station. Wendy Maeda/Globe Staff Cabdriver Bill Walker said he frequently chatted with fellow driver, Khairullozhon Matanov, outside Braintree MBTA station. Wendy Maeda/Globe Staff The Quincy cabdriver was a friend of slain Marathon bombing suspect Tamerlan Tsarnaev. Reuters/File Matanov allegedly talked to Tamerlan 42 minutes after the Marathon attack. Wendy Maeda/Globe Staff Resident Tyler Young, 27, said he was stunned by the accusations. “It’s shocking,” he said. Wendy Maeda/Globe Staff The front door of the apartment on Common Street where Matanov lived. Wendy Maeda/Globe Staff Neighbor Leslie Aiello, 49, said Matanov was a mysterious figure who never said hello.