Transcript for New Details About the Death of Maryland Police Officer Jacai Colson Shot by Fellow Officer
Next from Maryland tonight new details about a chaotic gun battle right outside a police station we reported earlier this week. But officer Takais Colson undercover and out of uniform at the time was reportedly killed by friendly fire. Well tonight the police chief now saying the preliminary investigation reveals what they fear that it was a fellow officer who shot. Here's ABC's senior justice correspondent Pierre Thomas now. The tragic death of detective do cry Colson has shaken the prince George's county police department to its core. Today the fears of a fellow officer was responsible were confirmed police say one of calls since colleagues shot him. Because he perceived a threat apparently thinking Colson was one of the suspects. The shot that. Struck and killed detective Colson was deliberately aimed at him by another police officer there is no intention. As as I have seen the facts indicate any malice. Carlson in plain clothes and an unmarked car was killed during an exchange of gunfire. When police responded to the attack on Monday IS to chief about the pain of knowing that one of his own officers may have mistakenly shot another. You've struck another defender down. That's particularly devastating police must now resolve critical questions. Including how and why this mistake was made and how tragedies like this can be prevented in the future. David Pierre Thomas in Washington tonight peer thing.
This transcript has been automatically generated and may not be 100% accurate.