On September 20, 2018, four people were shot and killed outside a Rite Aid distribution center in Aberdeen, Maryland, United States.

[12] Preliminary reports suggest that at least three people were killed in the attack, although the Harford County Sheriff declined to give a precise number of wounded and deceased victims during the press conference.

[6] Johns Hopkins Bayview Medical Center Trauma Director released a statement that the hospital received four victims with gunshot wounds, and by 2:30 pm.

[24] The Washington Post reported that Moseley "had been beset for years by mental illness as well as emotional turmoil related to his struggle with sexual identity, according to authorities and a close friend.

[26] Maryland Governor Larry Hogan used Twitter to express his condolences and thoughts on the situation and tweeted "We are closely monitoring the horrific shooting in Aberdeen.