Hidalgo hasn’t decided who would conduct such an independent review or how it would be done, Lemaitre said Monday. The police department’s probe would be separate from any independent investigation ordered by County Judge Lina Hidalgo, Harris County’s top elected official, according to Rafael Lemaitre, a spokesman for the county judge’s office. “All of the information we have available to put out at this time has been placed out on Twitter,” Silva said. Such decisions are often made in investigations like police shootings. Houston Police Department spokeswoman Jodi Silva declined to comment on questions about whether its close involvement in the event created a conflict or if it considered handing the probe off to an outside agency. While a prominent local official is calling for a separate, independent review of the tragedy, experts in crowd safety say an investigation by neutral outsiders could help the city avoid potential conflicts of interest and promote transparency. Now the city’s police department is leading the criminal investigation into how the deadly chaos erupted during Friday night’s performance by rapper Travis Scott. The police chief even says he met with the headlining performer before the show. HOUSTON (AP) - The Houston police and fire departments were deeply involved in safety measures for the music festival where a surging crowd killed eight people, playing key roles in crowd control measures, on-site security staffing and the emergency response.