Afable said Hoag's safety procedures were followed, although he wouldn't characterize them as a lockdown or evacuation.
Becky Calderwood works two doors down from the suite where the killing occurred and worried about her safety in a shooting.
"I sit right at the front desk; I would have caught the first bullet," she said. "This is nuts; people are just shooting everyone all the time."
Newport Beach detectives are working to determine a motive for the shooting.
Elkus legally purchased and registered the handgun allegedly used in the crime, Lowe said.
The Riverside Sheriff's Department said Elkus does not have a permit to carry a concealed weapon.
Elkus was being held on a $1-million bond in Orange County Jail in Santa Ana and is expected in court Wednesday, jail records show.
Neighbors in his Riverside County neighborhood were shocked to hear about the shooting, they told the Los Angeles Times.
Sherry Martin, 58, said Elkus, a thin man who always wore a baseball cap, was known for riding his bike around the Riverside County neighborhood.
Jail records list him as 5 feet 8 inches tall and 162 pounds.
"He did everything on his bicycle," Martin said, adding Elkus was a retired barber who would sometimes offered haircuts to neighbors.
Elkus asked his neighbor, James Lord, to fix the brake pedal on his car Sunday, Lord said.
After Lord was done fixing the pedal, he said Elkus gave him $10 and wanted to let Lord keep the tool he used.
Lord tried to refuse the money and tool and remembered Elkus saying something like, "I'm not going to be alive much longer."
Lord said Elkus sometimes complained about his health problems and frequently visited the doctor.
"He didn't really seem disconnected or anything," he said.
Elkus had a disagreement with at least one neighbor. He took them to small claims court, alleging damage to his property.
In 2007, a couple filed a $10,000 civil suit against him, alleging he stalked and harassed them because of the disagreement.
They allege in court documents that Elkus would verbally threaten and harass them, their children and pets — peering into windows, incessantly riding his bicycle in the driveway or tailgating them in his car.
The parties settled the case in 2008, with Elkus paying the couple nothing.
At dusk Monday, maintenance workers gathered outside the crime-scene perimeter, waiting to get inside the building. A rabbi crossed under the police tape, praying as he walked to the scene.
In the Gilbert's Huntington Harbour neighborhood the same evening, neighbors described the family as deeply religious Jews.
"I have nothing but good things to say," Betty Combs said. "On Saturdays, [the Gilberts] dressed to the nines and walked to synagogue."
A man answered the door at Gilbert's large, hacienda-style home Tuesday morning, saying "we're really in a state of mourning right now."