The suspect in the fatal shooting of three Baton Rouge cops maintained a robust social media presence and a website called Convos With Cosmo in which he describes himself as a “freedom strategist, mental game coach, nutritionist, author and spiritual advisor.”

The domain registry information for Convos with Cosmo lists Gavin Long at his known home address as the registrant, and a law enforcement source has confirmed to NBC News that a Twitter account linked to the website is the shooter’s account.

The website also links to a now disabled Instagram account and Twitter feed, in which he noted in a message posted mere hours before the shooting: “Just bc you wake up every morning doesn’t mean that you’re living. And Just bc you shed your physical body doesn’t mean that you’re dead.”

IMAGE: Gavin Long

IMAGE: Gavin Long

The website also references to a second portal promoting his life-coach business and includes Amazon links to three self-published books under the brand “The Cosmo Way.”

Many of his posts are dedicated to his ideas of what it means to be an “alpha” male.

On that site there is a link to “Cosmo Setepenra’s” LinkedIn profile, which notes he graduated from Central Texas College in 2011 with an associate’s degree, and also studied at Clark Atlanta University from 2012 to 2013.

Long officially filed paperwork in Jackson County, Missouri, last year declaring himself Cosmo Ausar Setepenra, a “sovereign citizen” of the United Washitaw De Dugdahmoundyah Mu’ur nation, a loosely affiliated network of mostly African Americans who claim to be Native American and don’t believe the U.S. government has jurisdiction over them.

Related: Community Mourns the Loss of Baton Rouge Cops

Long — who turned 29 on Sunday, the day of the shooting — spent a semester at the University of Alabama, where he made the Dean’s List, according to the school’s website. A spokesperson for the school confirmed to NBC News that Long attended school there for one semester in the spring of 2012.

Long was legally divorced from Aireyona Osha in May, 2011, according to Missouri state records, which say that Long sought the divorce. The Kansas City Star notes that they published a marriage announcement for the couple on July 22, 2009.

A summons against Long for delinquent city earnings taxes was issued in April 2016, according to state records. The case was dismissed on June 7, 2016, though the events preceding it are unclear, as they’re unavailable online.

Long was a Marine sergeant who served from 2005-2010, who was deployed to Iraq from June 2008 to January 2009, according to military records obtained by NBC News.

Among his duty assignments were Marine Corps Recruit Training Depot San Diego; School of Infantry, Camp Pendleton, Calif.; Marine Corps Communications Electri School, Twentynine Palms, Calif.; Headquarters Battalion, 3rd Marine Division, Okinawa, Japan; Marine Aircraft Group 38, 3rd Marine Air Wing, Marine Corps Air Station Miramar, San Diego.

In one YouTube video just posted on July 8, Long goes out of his way to claim he’s “not affiliated” with any movement or individual.

“I want to let ya’ll, if anything happens with me … don’t affiliate me with nothing … I’m affiliated with the spirit of justice, nothing more nothing less.”