Those numbers seem to be vastly more than reported numbers of police killings. Whom are you quoting? Because I like to keep track of who makes such exaggerated claims.
It says that between 2013 and 2018, about 96 in 100,000 (approx 1 in 1000) African American men were killed by police in the U.S.
Death from Covid is also lifetime risk.
It is a commonly reported statistic if you want to find other publications that say the same thing. Did you try googling for it — for example google: "1000 black men and boys" police