Brown is the son of Chris Brown who was a police officer in the Chicago metropolitan area for 30 years in Maywood, Illinois. Brown played high school basketball at Proviso East High School in Maywood, Illinois. Playing for coach Donnie Boyce, he led the Pirates to a state runner-up finish in 2012 and a state semifinal appearance in 2013, losing both times to the Jabari Parker-led Simeon Career Academy. Brown ultimately selected SMU and coach Larry Brown over Miami, Tennessee and Xavier. Brown and the Mustang class of 2017 endured three years of adversity as they missed the NCAA Tournament in his freshman season. The following season, they were upset in the first round of the Tournament. In his junior year, SMU served an NCAA probation in 2015–16. In his senior season, Brown averaged 13.4 points and 6.5 rebounds per game. Along with Semi Ojeleye he led the Mustangs to a 30–5 record and regular-season and Tournament American Athletic Conference championships. At the close of the season, Brown was named second-team All-conference. Brown finished his Mustang career as the school's all-time leader in wins.
Professional career
Milwaukee Bucks (2017–present)
Following the close of his college career, Brown raised his profile by appearing in the NABC College All-Star game and attended the Portsmouth Invitational Tournament. He was considered a potential second-round prospect for the 2017 NBA draft. Brown was drafted in the second round with the 46th pick of the 2017 NBA draft by the Philadelphia 76ers. On July 6, 2017, his draft rights were traded to the Milwaukee Bucks in exchange for cash considerations. Brown appeared in his first NBA game on October 20, 2017, against the Cleveland Cavaliers, posting three points in six minutes in Milwaukee's second game of the season. On November 3, 2018, Brown was assigned to the Wisconsin Herd. In his first game of the 2018-19 season, he scored 22 points on 10-of-17 from the field. When Malcolm Brogdon was unavailable on January 20, 2018 against Philadelphia, Brown started and scored 14 points. He posted a season-high 15 points on March 7, against the Houston Rockets. On January 26, 2018, Brown was tased and arrested inappropriately according to the Milwaukee Police Department Police Chief Alfonso Morales the following May. Brown brought suit in June 2018 after the May release of bodycam footage and alleges racial profiling occurred in the administration of a parking ticket at a Walgreens parking lot. In October 2019, Brown rejected a $400,000 settlement offer. Brown has expressed that he has rejected the offer in part due to his ability and sense of responsibility to use his platform as an NBA player to raise awareness. November 27, 2019 court filings indicate that a federal civil rights lawsuit is proceeding to trial. On March 31, 2019, Brown posted a career-high 27 points, including a go-ahead layup with 1.1 seconds remaining in overtime against the Atlanta Hawks.
On January 26, 2018, at 2 a.m., Brown was approached by a Milwaukee police officer because his car was straddling two handicapped parking spaces. This occurred in a nearly empty Walgreens parking lot on the south end of the city, the intersection of South 27th street and National Ave. After Brown interacted with the officer, who requested backup, a number of officers arrived on scene. Several minutes after the first officer began talking with Brown, an officer yelled at Brown to remove his hands from the pockets of his hoodie. Brown responded, "I’ve got stuff in my hands". He was subsequently tackled to the ground and tased. Brown was arrested on suspicion of resisting arrest, but the case was not referred to prosecutors after an internal review. Four months later, the Milwaukee Police Department released the approximately 30 minute video taken by police body camera. After negative public reaction, the Milwaukee Police Chief Alfonso Morales indicated that the officers had been disciplined for acting "inappropriately". Brown called the incident "an attempt at police intimidation, followed by the unlawful use of physical force."