The Houston Police Department has completed its investigation into a drug raid in January that left a man and woman dead.

According to the Houston Chronicle, investigators have turned over their findings to prosecutors, moving the case one step closer to possible criminal charges against one or more of the officers involved in the raid.

"The Houston Police Department has completed the criminal investigation and the officer-involved shooting investigation regarding the incident at 7815 Harding Street on January 28, 2019," Chief Art Acevedo said in a statement Wednesday afternoon. "Today, each of these separate investigations have been turned in to the Harris County District Attorney's Office."

The FBI has launched a civil rights investigation and the district attorney's office has been reviewing more than 2,000 cases previously handled by two narcotics officers at the center of the raid.