PITTSBURGH (AP) — Trial has begun in western Pennsylvania in the death of an off-duty Pittsburgh police officer shot and killed in a street confrontation more than 3 1/2 years ago. Thirty-four-year-old Christian Bey is charged in Allegheny County with homicide in the July 2019 shooting that killed 36-year-old Officer Calvin Hall after an apparent dispute at a Homewood block party. The Tribune-Review reports that Deputy District Attorney Stephanie Ramaley told jurors in her opening statement Tuesday that DNA on the murder weapon matched that of the defendant. Defense attorney Carmen Robinson said the case was about “a rush to judgment and a biased investigation.”