Bullshit. Plenty of unarmed white guys shot by police; at best local media does a story.
List the recent ones. Say, every shooting of an unarmed white guy you can find during the past 5 years. Then we'll see if the same police forces shot unarmed black guys during the same time period and do a comparison. Or, if you'd rather not focus on specific cases, then show the studies or statistical analysis that supports your claim.
That article in Nature I quoted has a list of studies indicating unarmed blacks are shot much more frequently than unarmed whites. If that's true then we should expect the media to report the shooting of an unarmed black man much more often than the shooting of an unarmed white man.
Or, to put it another way:
Incident A gets a lot of media coverage because consumers of media have a strong interest in it.
Statistical analysis indicates Incident A happens to blacks twice as often as it does to whites.
Therefore, the infrequency of media reports of Incident A happening to whites compared to the frequency of media reports of Incident A happening to blacks, does
not indicate media bias against whites. It only indicates the comparative frequency of Incident A for both groups.