Jacob Blake's Uncle Pissed Ex-Cop Was Tapped to Review Investigation

The Jacob Blake investigation is nearing its end, but before it crosses the finish line, a neutral third party has been looped in -- a former cop -- something a Blake family member is none too pleased about.

Jacob's uncle, Justin Blake, tells TMZ ... he feels the news about DOJ investigators bringing in former the Madison, WI police chief as a consultant in the probe is an open-palmed slap in the face.

Fact is ... he believes the so-called impartial second set of eyes announced this week, Noble Wray, can't be impartial. Justin believes he simply can't help but be biased against Jacob.

Wray is a retired chief who was on the force in Madison for years, a Wisconsin native ... and even has experience in legal consulting on the biggest stage. He served as a police reform specialist for the U.S. Department of Justice. But, Justin doesn't think Wray's accomplishments matter, because he says it's simply impossible for ANY law enforcement officer -- especially a former police chief -- to objectively reach conclusions about police brutality.

Justin favors putting a judge or even a politician in place of Wray.

ICYMI ... Wisconsin AG Josh Kaul and Kenosha County D.A. Michael Gravely said Monday they were going to have Wray -- who's African-American -- give a thorough review of the feds' DCI unit's findings in the case, offer up his analysis ... and then kick all of that back to Graveley's office for consideration on possible charges against Rusten Sheskey, and maybe others.

The process has dragged on for a month now -- the timeline the AG first gave to the public initially -- and now, it might be even longer before a final decision is made. The fact it's taken this long also irks Justin, who tells us he's been wanting more consistent updates.