A Cook County judge was gunned down outside of his home the morning of Monday, April 10.

Raymond Myles, a Cook County Associate Judge, was gunned down behind his West Chesterfield home on the Far South Side during an attempted to save his girlfriend from an alleged robber, DNAinfo.com reports.

The incident occurred when Myles and his 52-year-old girlfriend were preparing to go to the gym shortly before 5 a.m., according to the Chicago Tribune.

A gunman confronted Myles’ girlfriend near the judge’s garage and shot her in the leg. Myles rushed outside upon hearing the commotion. Myles exchanged words with the judge before he was shot multiple times and killed.

A neighbor heard Myles’ girlfriend scream, “Don’t kill him don’t kill him!”

Myles was pronounced dead at Advocate Christ Medical Center in Oak Lawn, CBS Chicago reports. The woman is in serious condition at Christ Medical Center.

Chicago Police tell NBC Chicago the motive of the shooting is unclear as no valuables were taken during the crime.

Police speculate various reasons for the crime, including a beating the judge suffered in 2015 and recent threats he received, according to the Sun Times.

Police are currently looking at surveillance cameras to lead them to the killer.