Update as of 3 p.m. Dec. 11:

A candlelight vigil will be held for Sgt. Kaila Sullivan, who was killed in the line of duty the evening of Dec. 10.

The vigil will be held at 6 p.m. Dec. 11 at Nassau Bay City Hall, 1800 Space Park Drive, Nassau Bay.

Update as of 1:30 p.m. Dec. 11:

Nassau Bay officials have named a suspect in the Dec. 10 death of Sgt. Kaila Sullivan.

Tavores Dewayne Henderson, 21, is the man suspected of striking Sullivan with a vehicle, killing her, during an attempted arrest around 8:30 p.m. Dec. 10.

By 9 a.m. Dec. 11, the Harris County SWAT Team made forced entry into the building Henderson was suspected to be in, but he was not found.

There is a $20,000 reward for tips leading to Henderson's arrest. Anyone with information about Henderson can call Harris County Crime Stoppers at 713-274-9100.

Residents who want to donate to Sullivan's family can do so by calling 281-841-4420 or 281-979-2271.

For more information, visit www.nassaubay.com/officer.

Original story:

A Nassau Bay police sergeant died Dec. 10 in the line of duty. Her killer is still at large.

Around 8:30 p.m., an unidentified assault suspect struck Sgt. Kaila Sullivan with a vehicle, killing her. She was 43 years old.

In the evening, Nassau Bay police made a traffic stop at an apartment complex at 2002 San Sebastian Court. Officers learned the suspect was wanted on a Harris County warrant on charges of assaulting a family member, according to a Nassau Bay press release.

During the arrest, the suspect fought with officers, broke free and re-entered their vehicle. The suspect struck Sullivan while driving away, the release reads.

First responders were called and started chest compressions on Sullivan. An ambulance took her to HCA Houston Healthcare Clear Lake, where she died, according to the release.

Police found the suspect's vehicle a short distance from the original traffic stop, but the suspect is still at large. The Harris County Sheriff's Office and Webster Police Department are assisting with the investigation. Anyone with any information should call the Harris County Sheriff's Office homicide line at 713-274-9100, according to the release.

Sullivan was a Friendswood resident. Dec. 27 would have been her 16th anniversary with the Nassau Bay Police Department, the release reads.

“I want to personally thank all the citizens and public who have reached out to our department with thoughts and prayers," police Chief Tim Cromie said in the release.

This story is developing.