Jawaad Darcelle Reaves, 21, was ordered held Monday on $100,000 bail in connection with the death of his older brother, Jermaine.

Reaves is being held in San Juan County Jail and the Prosecuting Attorney’s office has until Wednesday to file charges.

At 2:40 a.m. Sunday, sheriff’s deputies went to Reaves’ apartment at 500 Tucker Ave. to investigate a domestic violence report made by a neighbor. When they arrived, they were met in the parking lot by Jawaad Reaves.

“He met the arriving units,” Sheriff Bill Cumming said Sunday. “He was highly agitated and upset about the circumstances.”

In the apartment, deputies found Jermaine, mortally wounded with a gunshot wound to the chest. Reaves was taken by Airlift Northwest helicopter to St. Joseph’s Hospital in Bellingham, where he was pronounced dead.

In the apartment at the time were the Reaves’ mother and a friend. The brothers lived together in the apartment, Cumming said. Also found in the apartment: A 20-gauge shotgun. Cumming believes Jermaine Reaves was shot once.

A 20-gauge shotgun is commonly used to hunt small game.

Jawaad Reaves was taken into custody at the scene. His attorney is Lawrence Delay.

Jawaad Reaves appeared in handcuffs for his preliminary hearing in Superior Court Monday. Judge John Linde noted the “extremely serious situation” of the fatal shooting in siding with prosecutors in setting bail at $100,000. (Reaves would be released, though, under court orders, by posting 10 percent of the bail amount via a bond).

Reaves would be released within 72 hours of his arrest should prosecutors fail to file charges. An arraignment is slated for Oct. 10.

A standing-room-only crowd, mostly of Reaves’ family and friends, packed the courtroom Monday. Sobs broke out as Jason Napier, a friend of the brothers, described the close bond the two brothers shared, as well as the dreams Jawaad had for himself.

“They were more than brothers, they were best friends,” Napier said. “It’s just so hard to imagine this has happened. We’re all in a state of shock.”

An investigation into the domestic violence report was also continuing Monday, Cumming said.

Gabrielle Scott, a former islander now living in Chicago, said Jermaine was “polite” and a “gentleman.”

“God rest his weary soul,” she wrote in an e-mail.

In a phone interview, she said, “He was a very polite young man who was trying to make his way in the world. He had had some problems but he was trying to make amends. He was only 21 years old. He hadn’t even started his life yet.”