Kelly's 34-year-old daughter, Crystal Vasquez, drove to the location hours later.
Vasquez went into the restroom of a nearby business and was discovered dead of a gunshot wound.
San Diego Police said Vasquez shot and killed her mother the afternoon of July 20. The next day, Vasquez cashed a $5,000 check written from her mother's bank account.
Police told 10News the Vasquez likely shot her mother after being confronted about stealing money from the family business.
Vasquez embezzled money from her mother's Mission Valley accounting business for about a year, according to police.
Police believe Vasquez shot herself after learning about the possibility of cameras at the building's entry and exit.
A forensic examination confirmed the handgun Vasquez used to commit suicide was the same gun used to kill Kelly. Video surveillance also showed Vasquez was in the office with Kelly at the time of the murder.