An Evanston teen has been charged with killing 21-year-old Cardereon Preister, police said Thursday.

Matthew Dubose, 18, is accused of fatally shooting Preister shortly after 11 p.m. Sept. 10 outside Preister’s home in the 1700 block of Leland Avenue. The incident happened about two blocks west of Evanston Township High School, 1600 Dodge Ave.

Police said Preister was shot once in the upper torso from behind. He was pronounced dead a half hour later, according to the Cook County medical examiner’s office.

Dubose, of the 1800 block of Hovland Court, tried to trade drugs and money for Preister’s gun earlier this summer, police said. Evanston Police Cmdr. Jay Parrott told The Daily that Preister did not hold up “his end of the bargain.”

“The exchange went awry between the two, which in turn lead to the murder of Preister several weeks later,” Parrott said in a news release.

Police arrested Preister at 4 p.m. Tuesday in the 3200 block of Grant Street.

Preister was scheduled to be released from parole for burglary and drug charges in November.

Preister, a onetime ETHS student, was involved in the city’s Youth & Young Adult Division. He worked this summer at Bryn Mawr Country Club in Lincolnwood, Ill.

“Your wide smile will truly be missed,” a note on a makeshift memorial outside Preister’s home reads. “You may be gone but you will never be forgotten.”

Dubose has been charged with first-degree murder. He is scheduled to appear in court 9 a.m. Friday.

A funeral service for Preister will be held 11 a.m. Friday at Christ Temple Missionary Baptist Church, 1711 Simpson St.