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Friends and family of the Chattanooga shooter struggle to reconcile his private turmoil with what they saw from the outside.

Nearly five days after the shooting at two military facilities that left four Marines and one Navy sailor dead, investigators have given no indication that a definitive motive has been identified.

When the name of the suspected gunman was released, friends and classmates of Mohammad Abdulazeez thought it was crazy that they had the same name. Two days after the shooting, his family echoed his friends’ confusion in a statement, saying Abdulazeez was “not the son we knew and loved.”

Yasmeen Abdulazeez deleted her Instagram account after the shooting.

Via Instagram: @yabdulazeez

Now, everything from Abdulazeez’s online blog espousing devotion to the Muslim faith, and possible radicalization, to his history with depression and drug and alcohol abuse, has come under heavy scrutiny by investigators.

BuzzFeed News spoke with multiple friends of Abdulazeez and his sister, Yasmeen, about clues into his motivation for the deadly attack.

WE’RE KEEPING AN EYE ON

Texas officials are treating the investigation into the death of Sandra Bland as they would a possible murder.

Bland was found dead in her jail cell on July 13, three days after she was arrested following a traffic stop. Waller County Sheriff officials said they think she died from asphyxiation with a trash bag and that her death was a suicide. But Waller County District Attorney Elton Mathis said there “needs to be a thorough and exhaustive review.”

“Friends and family of Bland have publicly questioned whether her death was a suicide, and public scrutiny has only increased after a cell phone video of her arrest on July 10 showed officers holding her to the ground as she yelled, ‘You just slammed my head into the ground,’” BuzzFeed News’ Salvador Hernandez writes.

Sandra Bland and a screenshot of a video of Bland’s arrest shows two police officers restraining her on the ground.

Via Facebook and abc7chicago.com

What’s next?

Surveillance video of the jail cell where Bland was held was released yesterday, and dashcam video of her traffic stop and arrest is due to be released today. In addition to the investigation by Waller County sheriff’s officials, the Texas Rangers and the FBI are also looking at the case. “Once the investigation is completed, it will be reviewed by a Waller County grand jury, which meets monthly,” Hernandez reports.

DID YOU HEAR ABOUT THIS?

How did a homeschooled, evangelical Christian from Chattanooga become an ISIS wife and mother?

Ariel Bradley was raised in a Christian family in a suburb of Chattanooga, Tennessee. She was once a bubbly, caring, self-described feminist who got tattoos and dropped acid. BuzzFeed News’ Ellie Hall dug into her background and interviewed her former friends to try to find out why Bradley converted to Islam, married a Muslim man whom she never met before they got engaged, and moved with him to ISIS-controlled territory in Syria. “It seemed like whatever guy she was with, she would just crawl into his skin and kind of become him,” a friend of Bradley’s told Hall.

Robert Parker for BuzzFeed News

This French teen’s HIV has been in remission for 12 years with no medication.

The 18-year-old girl, who was born with HIV and given intensive drug therapy in early childhood, has been HIV-free for 12 years without the use of any medications. While she’s not technically cured, she doesn’t carry detectable signs of the virus. Her case is the “longest-running instance of HIV remission in children to date, and is raising hopes that long-term interruption of the infection is possible in other kids as well,” BuzzFeed News’ Azeen Ghorayshi writes. But researchers warn about making too much about the incredibly rare case.