MILWAUKEE – When waitress Stephanie Wengler spotted a customer wearing a shirt with a thin blue line flag on it, she felt compelled to ask the woman if she was a police officer.

The woman confirmed both herself and her husband, who was sitting beside her with their children, were officers. Wengler, a waitress at a Milwaukee Cheesecake Factory, was struggling to find the right words to say to the officers — just days after one of their own, 35-year-old Matthew Rittner, was killed on duty, reported WJDT.

Matthew Rittner

(LET Graphics)

“All I said was, ‘Thank you,'” she said.

Rittner, a 17-year veteran of the department, was killed during a raid on a Milwaukee man’s home. The officer was part of a tactical unit serving a warrant to search the home for illegal narcotics and weapons on Feb. 6 when he was fatally shot in the chest.

Moreover, Rittner was the third Milwaukee officer killed in the line of duty in eight months. The department had previously gone more than two decades without such a death.

“This was such an unfortunate event that really didn’t need to happen,” Wengler told the news station.

To show her support for the Milwaukee Police Department and officers across the country, Wengler decided to give the couple a touching note.

“Dear officers, I can’t fathom what you’re going through. I wanted them to know that they were loved, and despite the situation that has happened, I will always back the blue,” Wengler wrote, according to WJDT.

Touched by the waitress’ sweet gesture, the couple decided to contact Wengler’s manager to say they were “super grateful.”

“I can’t imagine going through one of their funerals … I don’t think they get enough recognition,” Wengler said, adding her father is a retired firefighter.

This undated image provided by the Milwaukee County Jail shows Jordan Fricke. On Sunday, Feb. 10, 2019, Fricke was charged with first-degree intentional homicide and other crimes in the fatal shooting Wednesday of Officer Matthew Rittner, who was serving a search warrant. (Milwaukee County Jail)

Jordan P. Fricke, 26, has been charged with first-degree intentional homicide and other crimes in the fatal shooting of Rittner. A $1 million cash bond was set Sunday for Fricke, who remained in jail.