Atlanta shooting suspect Robert Long: What to know

As details emerge following the mass shooting that took place in the Atlanta area on Tuesday, in which eight people were killed, former classmates of the suspect, Robert Aaron Long, are expressing shock at the news.

"He was a totally different person in school," Jonathan Desire, who graduated with Long, told Fox News on Wednesday. "Quiet, calm, and collected."

Long is suspected of shooting and killing eight people at three different spa locations. Officials have stressed that the investigation is ongoing, with authorities not making an official determination as to the motive of the attacks at this time. Cherokee County Sheriff Frank Reynolds said the suspect may have a "sexual addiction" and "may have frequented some of these places in the past," but said it was too early in the investigation to say whether they were dealing with a hate crime.