Neither Facebook nor Instagram responded to a request for comment Friday.
Sparse pictures on social media showed a happy family.
On Wednesday night, the former machine gunner, dressed all in black with his hood pulled up, opened fire with a handgun at the Borderline Bar & Grill during college night, then apparently killed himself as scores of police officers closed in.
As investigators worked to figure out what set him off, President Donald Trump blamed mental illness, describing the gunman as "a very sick puppy" who had "a lot of problems".
Federal Bureau of Investigation officials have swarmed the house, desperate to find the motive behind his alleged shooting rampage.
Authorities said Long was found dead at the scene after he had killed12 people, including a sheriff's deputy, and was confronted by officers who had stormed the bar. "They called out our crisis intervention team, our mental health specialist, who met with him, talked to him and cleared him".
Trump also ordered the United States flag at the White House and other government buildings to be flown at half-staff. I want gun control, and I hope to God nobody else sends me any more prayers.
The mother of the 27-year-old man killed in the latest attack, Telemachus "Tel" Orfanos, said her son survived Vegas only to die inside Borderline, less than 10 minutes from his home.
Authorities haven't named all the victims of the attack.
Thousands demand Mueller protection after Trump fires Sessions
First of all, let's drop the fiction that if Sessions hadn't been fired, the Democratic subpoena assault wouldn't have happened. Just to review how we got here, last year, Jeff Sessions recused himself from any investigations into the 2016 campaign.
"He took decisive action, and it's just a tragic loss for us", he said.
About 18 months ago, Don and Effie MacLeod heard "an bad argument" and what he believes was a gunshot from the Longs' property.
Speaking with local reporters, Dominique Colell recalled the incident that began with a dispute over a cell phone and ended with Long groping her as he grappled with her over the phone.
And tonight, as I told his wife, he died a hero because he went in to save lives.
"He had just a natural instinct for going after crooks, and he did it with enthusiasm, with a great deal of intelligence".
Once he helped get people down the street to safety, Wennerstrom said he and others went back to help anyone remaining. On his way to the bar, Helus was talking on the phone with his wife, his last words to her as obtained by the Los Angeles Times were "Hon, I got to go, I love you".
In one instance, 38-year-old Colell says Long grabbed her rear and midsection after she refused to return a cellphone he said was his.
"I nearly like wanted to see him to kind of like wrap my brain around it because I was like I couldn't believe it this isn't happening", Campbell said.
Colell said Long was "the only student that I was actually scared of when I coached there".
She said the gunman "knew what he was doing", Fox News reported.
For the former Newbury Park High School track coach this day has been full of emotions - from sadness to guilt.