Transcript for Officer files lawsuit against Breonna Taylor’s boyfriend
Rescuers reportedly finding and saving a young girl, just 4 or 5 years old, who had been trapped for up to ten hours. And the officer sued for breonna Taylor's death is now here's Steve osunsami. Reporter: There are many people tonight who feel that sergeant Jonathan Mattingly and the other Louisville police officers who were at this apartment building in March got off easy. And should have been charged with murr for the shooting and killing of breonna Taylor, the young medical worker who everyone now agrees did nothing to deserve this. Taylor's boyfriend Kenneth walker, who is seen here being taken into custody by police, is suing authorities, saying officers broke into the home without announcing who they were. But tonight, sergeant Mattingly is countersuing Taylor's boyfriend, who fired the first shot from the other side of the door, saying he thought they were thieves. The sergeant, who was wounded and returned fire, needed hours of surgery and is accusing walker of battery, assault, and intentional emotional distre saying that walker "Acted recklessly in firing his pistol in the direction of the police officers who were serving a search warrant." In an exclusive interview with ABC news and the "Louisville courier journal," Mattingly says that walker shares the blame for his girlfriend's death even though it was police who killed her. The impossible situation that Kenneth walker put her in in that hallway, with this narrow hallway, shooting from it, him diving out, I'm assuming she was trying to follow him into the room. Reporter: People who support Taylor's family are outraged by this. Walker said he would never knowingly shoot a police officer. His lawyers say if he can be sued, any legal gun owner should be concerned about this. David? Steve, thank you.
This transcript has been automatically generated and may not be 100% accurate.