[2] Justin started attending Los Angeles Southwest College in 1973 after his graduation from Crenshaw and was convinced by his friends to begin playing football.
[3] In 1978, he trained with several Los Angeles Rams players and one of them convinced the team to give Justin an invite to the spring minicamp.
[3] The team had many defensive backs at the time and one coach suggested that Justin go to play for the minor league Southern California Rhinos, which he did for the season.
[3] Justin was considered a long shot to make the team, but impressed in preseason for his talent in man-to-man coverage and quickness.
[5] Justin went on to appear in 13 games for the Rams that year, recording one interception and making an 80-yard blocked field goal return touchdown, the only score of his career, before being placed on injured reserve in mid-December due to a pulled hamstring suffered on the blocked field goal return.
[13] Justin played two games for the Blue Bombers, posting one interception return for two yards before being released at the end of the month.
[26] He began as an assistant to Harold Daniels at Harbor Junior College, before becoming a coach at Westchester High School in Los Angeles.
[26] The Cardinals folded after one season, and Justin then went to Taft High School as defensive backs coach, helping them reach the city championship.
[28] After high school, he worked for a time with singer Candi Staton and performed for several movie soundtracks, including the songs "Shout" and "Shama Lama Ding Dong" in Animal House.
[3] He was part of the songwriting team Sylverspoon Productions, working with artists and groups including Leon Sylvers III, Glen Jones, Lakeside, The Whispers, Dynasty and Shalamar.
[26][30] Justin worked with Babyface and L.A. in producing the album Circumstantial Evidence, which featured the song "Love's Grown Deep" that placed number one on charts in Asia for five[a] months.
"[28] Justin performed in concerts with various other groups, including The Gap Band, Zapp, Earth, Wind & Fire, and Rose Royce.