Leonard's sister, 35-year-old Kimesha Monae Williams, and Candace Tai Townsel, 39, were charged with murder, robbery elder abuse, in the death of 84-year-old Afif Anis Assad on Friday.
The elderly woman was transferred to a nearby hospital but on September 4, she died from her injuries which included a fractured skull.
This isn't Williams' first run-in with the law, and not even the first time she's been accused of robbing someone at the same casino, located near Temecula, California.
"When questioned by reporters Saturday Williams' aunt told the Press-Enterprise, "[Kawhi] didn't have anything to do with this".
It would have required "a great amount of force, such as being pushed, thrown or punched by a 320-pound person", according to the investigator's notes.
The Riverside County Sheriff's Department stated that investigators have suspicions that the woman "may have been a victim of assault".
In regards to the alleged incident with his sister Kimesha, he has yet to comment publicly about her arrest.
Leonard was acquired in the off-season by the Los Angeles Clippers soon after leading the Toronto Raptors to glory during this spring's National Basketball Association finals - the franchise's first championship.
Both suspects are being without bail - Williams at the Indio Jail and Townsel at the Robert Presley Detention Center in Riverside.
Williams is being held without bail after the local sherrif's office recommended she remain in custody because she has family that are well off and could post her bail of one million dollars. "I am requesting NO BAIL to assure Williams' appearance in court and to keep innocent victims safe".
Williams has multiple convictions on her record, which include: petty theft, grand theft, misappropriating lost property, grand theft auto and attempted robbery. The two women reportedly have been accused in the past of stealing someone's wallet at the same casino in 2015.