Police think FBG Duck is dead because he mocked rival gang members who had already been killed in his video for "Dead Bitches", which he dropped last month and had millions of YouTube streams

"'Said I wasn't gon' diss the dead and okay, I did it. But n*gga, f*ck T-Roy and Odee, them dead bitches," he spits

Duck rolls with the Tookaville faction of the Gangster Disciples, who are named after Shondale 'Tooka' Gregory, who was killed in 2011.

Odee Perry and  James "T-Roy' Johnson are rival Black Disciples Members.  Odee was killed shortly after Tooka and T-Roy gunned down in 2017.

As Dead Bitches goes on, Duck mentions a number of other Black Disciples who have been killed.

Y'all heard about J-Money? (Yeah)
N*ggas gettin' dead the same way
Bitch, don't play with gang
You don't wan' look broke in your gang, wait
I know you heard about Lil Boo (Yeah)
They left his shit by a tire
Bullets was hittin' him, he was singin' like Mariah (Yeah)
Yeah, you heard about Sheroid (Huh, huh)
I know that hurt the heart (Goddamn)
He probably walkin', listenin' to his iPod (Goddamn)
Yeah, you heard about Lil Steve (Hm-hm)
Yeah, I heard about that too
But f*ck him though, he a pack too (Bitch)

So far there are no suspects in Duck's brazen broad daylight execution earlier this week.  However, police believe there will soon be a wave of retaliatory violence.  So does old head Lupe Fiasco.