Kelly, 27, was walking home from a bus stop near the 14000 block of Castle Boulevard in the Briggs Chaney area of Silver Spring about midnight Aug. 21 when he was approached by a group of men who wanted to rob him, said Lt. Robert Bolesta, deputy director of the Montgomery County Police Major Crimes Division at a press conference at Police Headquarters on Saturday.

Police arrested three men associated with the 38 Mob Street Gang in August in connection with the attack and are looking for a fourth, Tyshon Lateek Jones, 19, he said.

"To anyone who's helping Tyshon, please turn him in," said Kisha Kelly, Julian's sister. "The pain he has caused."

Her words trailed off.

Her brother was the father of two daughters, she said.

"The youngest will never know how great her father was," Kisha Kelly said.

Julian Kelly was a student at Tulane University in New Orleans when Hurricane Katrina struck in 2005. He did not return to the university when it reopened but took classes at Montgomery College. As a child, Kelly wanted to be a marine biologist. He worked in hotel management.

Kelly was returning home from his job at the Montgomery County fairgrounds in Gaithersburg when he was accosted, Bolesta said.

"There has to be someone out there helping Tyshon," Kelly said. "Someone has to know something. He's just a kid."

Jones is unemployed and does not have a vehicle, Bolesta said.

"He is without the means to remain at large without the assistance of others," he said.

Jones and his mother lived on Castle Boulevard before the attack, but police do not know where he was living at the time of the assault, said Detective Randy Kucsan, the lead investigator on the case.

When Julian Kelly resisted the robbery, he was beaten, robbed, then shot multiple times, Bolesta said.

Kelly died as a result of the gunshot wounds in a hospital Sept. 4, police said.

"Julian Kelly gave us vital information before he passed away," Bolesta said.

On Aug. 30, police arrested Shamire Moore, 19, of the 5500 block of Karen Elaine Drive in New Carrollton.

A day later, police arrested Khalil Rasheed Fields, 14, of the 3900 block of Blackburn Lane, and Charles Edward Baxter, 23, of the 3500 block of Gentry Ridge Court. Both Fields and Baxter live in the Briggs Chaney area.

All three have been charged with first-degree murder, armed robbery and the use of a handgun in the commission of a felony. Fields was charged as an adult, police spokesman Cpl. Dan Friz said.

The last known address for Jones is the 100 block of Raphael Court in Martinsburg, W.Va. The charges outlined in the warrant for Jones are the same as those against the three who were arrested.

Anyone who has information that will help the police find Jones is asked to call the Major Crimes Division at 240-773-5070. Anyone who wishes to remain anonymous may call Crime Solvers of Montgomery County toll-free at 866-411-TIPS (8477). Crimes Solvers will pay a cash reward of up to $1,000 for information provided to them that leads to an arrest and/or indictment of the persons responsible for this felony crime.

Staff Writer Jeremy Arias contributed to this report.

ssingerbart@gazette.netl; jarias@gazette.net