Comma would be weird; there’s no pause, for example: “he shot dead a heard of cattle”. It all flows as one line.
If you want to fix it, just ad an “an”:
“London Cop Who Shot Dead An Unarmed Black Man Charged With Murder”. Which is typically how the saying is used. If you want a comma, I’d add it after “man”.
Comma would be weird; there’s no pause, for example: “he shot dead a heard of cattle”. It all flows as one line.
If you want to fix it, just ad an “an”:
But I’m not a literary professor or anything.
About 10 seconds after I submitted the comment I realized my error and deleted it lol