Philadelphia District Attorney Larry Krasner said Tuesday that Eric Lewis was acquitted of a 2019 murder in 2023 because of serious problems with the police investigation — a case that is again drawing scrutiny after Lewis was charged in the fatal shooting of Officer Shane Seiber. Lewis, 35, is accused of killing Seiber and severely wounding another officer during a West Philadelphia shooting early Saturday. He faces charges including homicide of a law enforcement officer, murder and 10 counts of attempted homicide of a law enforcement officer. The allegations have not been proven in court. The earlier case involved the fatal shooting of 32-year-old Christopher Williams after a road-rage dispute in West Philadelphia. Krasner said an officer who was dating Lewis’ sister identified Lewis as the shooter, then undermined his own testimony by falsely claiming he had received anonymous information from a person who did not exist. Krasner described the conduct by the officer and a detective as potentially criminal, saying it went beyond errors and could amount to obstruction of justice. The judge who acquitted Lewis ordered the Philadelphia Police Department’s Internal Affairs Division to review what the judge called troubling law-enforcement conduct, according to Krasner’s office. A police department representative had not responded to a request for comment on the review’s outcome. Lewis also faced assault and gun charges in 2021, but that case did not go to trial after a key victim and witness died. The District Attorney’s Office said it knows of other 911 calls and possible complaints involving Lewis. Police said Seiber and another officer responded at about 12:15 a.m. Saturday to a report of a person with a gun at 140 N. 52nd St. Both officers were shot and found unresponsive on a porch, then taken to Penn Presbyterian Medical Center. Several other responding officers were also fired upon, police said. Seiber, 40, died from his injuries. A 10-year veteran of the force, he leaves behind a wife and two children. The second officer remained hospitalized, and police had not released the officer’s name. Krasner said his office is committed to pursuing the current case carefully and holding Lewis accountable. The earlier acquittal underscores how investigative conduct can affect whether prosecutors can bring a case to trial — and why the outcome of the ordered internal review remains significant for public confidence in the investigation.