OVERLAND PARK, Kan. - A white police officer in Kansas has been fired after making online threats to a 5-year-old black girl on Facebook.

LaNaydra Williams lives in Dallas, where five police officers were ambushed and killed Thursday night during an anti-violence protest.

Williams says an Overland Park, Kansas police officer, whom she's never met, commented on a photo of her 5-year-old daughter shortly after the shootings.

His comment read "we'll see how much her life matters soon... Better be careful leaving your info open where she can be found... Hold her close tonight... It'll be the last time."

MORE: Police officer fired for threatening 5-year-old

"For this guy to just come out of nowhere, just being disrespectful. How can you be an officer? How, how? That's unacceptable for a police officer, for anyone, but especially for a police officer" Williams said.

The Overland Park Police Department’s Facebook post also said Chief Francis Donchez Jr. wants “to assure the community the Overland Park Police Department will not tolerate any form of discrimination or threats.”

A criminal investigation into the incident is underway.