Another tragic notch was added to the United States' belt of mass shootings on Thursday when a woman opened fire at a Maryland Rite Aid distribution center. The suspect, Snochia Moseley, fatally shot three co-workers and left three others wounded before turning the gun on herself. 

The 26-year-old was a temporary Rite Aid employee and described as a typically "nice" person. Her motive for the shooting remains unknown. 

“Normally, she was a nice person, but she came in in a bad mood,” said Mike Carre, who works next door at a furniture distribution company, recounting what Rite Aid employees told him. “She wanted to pick a fight. And then she started shooting.”

CBS News reports the wife of a Rite-Aid employee said she'd been in a verbal altercation with a colleague after a meeting and "went off."

"She didn't have a particular target. She was just shooting," Krystal Watson told the outlet. 

Moseley is said to have reported to her work day as usual; however, unbeknownst to the rest of the workplace, she brought along a legally registered 9mm handgun. Around 9 a.m., she opened fire outside the facility before making her way inside. Hartford County Sheriff Jeffrey Gahler believes she had “two, perhaps three” extra clips of ammunition. 

“We do not at this time have a motive for this senseless crime…there were people shot inside and outside the business,” Gahler continued. “There are a lot of questions that still need to be answered in this."

In the search for a motive, officials have turned to Moseley's social media accounts. She described herself as the “Pretty kool, mellow type," on her Facebook "About Me" section, not a far call from friends and neighbors who described her as a "nice girl." However, her page also reveals that she believed in the "law of retaliation," citing her favorite Bible verse as Exodus 21:24: "an eye for an eye, a tooth for a tooth."

Whether her actions were motivated by revenge have yet to be determined. She now joins the 4 percent of female mass shooters. Adam Lankford, a criminologist at the University of Alabama in Tuscaloosa, reveals that mass killings, or  homicides involving three or more victims, are rarely carried out by women. According to The Washington Post, the most recent mass shootings by women involved three people being wounded in April at YouTube headquarters in San Bruno, California. In 2012, three people were fatally shot at the University of Alabama in Huntsville by a professor who was angry after being denied tenure.

Police say the three wounded victims are expected to survive. The identities of the deceased victims have not been released. Moseley later died from a self-inflicted gunshot to the head. 

As employees and residents try to wrap their head around the tragedy, Maryland Governor Larry Hogan offered words of comfort.

“The First Lady and I are grieving for the loss of life in today’s shooting in Harford County, and praying that those who were injured fully recover," he said. 

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Gun violenceMarylandMass-shootingRite Aid