Philadelphia District Attorney Larry Krasner said Tuesday that serious police failures weakened a 2023 murder case against Eric Lewis, who is now charged in the fatal shooting of Officer Shane Seiber and the wounding of another officer. Krasner made the claims in a video statement, arguing that the earlier case was damaged by the conduct of a police officer and investigative shortcomings by a homicide detective. He said the officer’s actions could amount to obstruction of justice. His statement did not say whether prosecutors would investigate the officer, and the district attorney’s office did not respond to questions about the case. Lewis, 35, was acquitted in 2023 of killing Christopher Williams in a 2019 road-rage shooting in West Philadelphia. He remains in custody on charges in connection with Seiber’s death and the shooting of another officer early Saturday. Police say Lewis also fired at nine other responding officers during a standoff that lasted nearly an hour. Seiber, 40, a 10-year police veteran and father of two, died hours after being shot. His partner, a 33-year-old officer who has served nine years, was shot 12 times and remains hospitalized, according to the account of the case. The police department said it is reviewing records from the earlier investigation. Spokesperson Sgt. Eric Gripp said the department’s immediate focus is supporting Seiber’s family, the injured officer and the police force. He said the department would address the full record later, adding that assigning blame while families are grieving does not advance accountability. The 2019 case concerned Williams, 32, who was shot on Aug. 31. Lewis was tried before Common Pleas Court Judge J. Scott O’Keefe in April 2023. O’Keefe acquitted him after finding weaknesses in the investigation and inconsistencies between an eyewitness’s account and evidence presented at trial. In a letter to police leadership, O’Keefe flagged several problems. Evidence from two different sets had been logged under the same property receipt number, which he said created suspicion about the investigation. He also wrote that lead detective Laura Harris did not appear to investigate whether the eyewitness’s account fit the physical evidence and medical examiner’s findings. Harris testified that she had requested Lewis’ social media records and provided them to prosecutors, but prosecutors said they never received them. Harris said she kept no copies. She also acknowledged that she prepared a warrant application for Lewis’ phone records but never obtained a judge’s signature, meaning the records were not collected. Asked why, she answered, “Oversight,” according to the trial transcript. The eyewitness told investigators that she and Williams were in a Jeep when a double-parked Nissan blocked them on Fallon Street. After Williams honked, she said, an argument began and a bald man approached and shot him. The defense challenged parts of her account, including the vehicle description and the placement of physical evidence. Prosecutors argued that the witness was traumatized and had nonetheless identified Lewis unequivocally. O’Keefe later reported his concerns to the Police Department’s Internal Affairs Bureau. Krasner said Harris was subsequently disciplined. Harris declined to comment Tuesday. Krasner singled out Naeem Amir Crawley, a police officer who, according to a person familiar with the case, had provided homicide detectives information identifying Lewis as the shooter. Krasner said Crawley was dating Lewis’ sister and tried to undermine his own testimony by inventing an alternate suspect and giving false information to investigators. Marriage records show Crawley and Keilah Lewis married in February 2024. Crawley did not testify in the 2023 trial or at a preliminary hearing; it was not clear whether he had been subpoenaed. Krasner said Crawley was later fired. Crawley and his wife did not respond to requests for comment. The renewed scrutiny has reopened painful questions for Williams’ mother, Darlene Brown. She said she believes Lewis killed her son and wants an explanation for why the case ended in acquittal. Brown said she had not previously heard that police misconduct may have affected the prosecution. She also described difficulties getting responses from investigators and said the case passed among multiple prosecutors before trial. “It’s overwhelming,” Brown said of the new information. She said she contacted the district attorney’s office Tuesday and was still waiting for a response. “I need answers.”