According to authorities on Tuesday, a Nigerian-American man who was charged with k?lling three people during a shooting spree in multiple Atlanta suburbs—including a Department of Homeland Security employee—has died in custody.

Olaolukitan Adon Abel, 26, was discovered unconscious in his jail cell shortly after 6:48 p.m. ET, according to the DeKalb County Sheriff’s Office.

At 7:17 p.m. ET, Abel was declared dead despite the DeKalb County Jail’s detention staff alerting medical personnel and initiating life-saving measures.

“There is no indication of cr!minal activity or foul play,” the sheriff’s office said in a statement.

An internal investigation has been opened to determine the circumstances of Abel’s d3ath.

Abel is originally from the United Kingdom and became a naturalized U.S. citizen in 2022.

Abel allegedly paid a homeless man to buy him a gun. He then used the weapon to fatally sh0ot three people at three different locations across the Atlanta area on April 13.

He was accused of shooting Prianna Weathers, 31; Tony Matthews, 48; and Lauren Bullis, 40.

Weathers, a mother to a preteen, and Bullis, who worked for the DHS, both d!ed from their injuries shortly after they were shot.

Matthews, a father, was hospitalized for six days but d!ed on April 19. 

Weathers was shot around 1 a.m. on April 13 outside a Checkers restaurant along Wesley Chapel Road near Decatur in DeKalb County.

An hour later, police said Abel drove to the northern Atlanta suburb of Brookhaven and shot Matthews, who was sleeping on the ground outside of a Kroger’s supermarket in a shopping plaza.

Between 6 a.m. and 7 a.m. ET, police said that Abel shot and stabbed Bullis while she was walking her dog in Panthersville, an unincorporated area south of Decatur.