Julian Troche, 24, was ordered held without bail today on charges he fatally shot Andrew Flonory at a party on Astoria Street in Mattapan on June 18, the Suffolk County District Attorney's office reports.

Flonory, who had survived a 2010 murder attempt, was the brother of Eyanna Louise Flonory, who, along with her young son, Amanihotep Smith, was shot to death in the 2010 Mattapan Massacre.

Boston Police report the BPD fugitive unit and SWAT team apprehended Troche as he sat in a car on Burbank Street in the Fenway Wednesday morning.

According to the DA's office:

"There had been a large party on Astoria Street that night, which the victims were approaching when a man produced a firearm and pointed it at them. This man - later identified as Troche - fired repeatedly at them from inside a fence at the location of the party, killing Flonory and wounding [another man].

"The evidence gathered by investigators included shell casings, projectiles, witness statements identifying Troche as the man who fired at Flonory, and cell phone records that show Troche in the immediate vicinity of the crime scene at the time of the homicide."