Officers were conducting a welfare check on Marquez at her Southern California home when Marquez pointed a BB gun at officers, which caused them to shoot her, according to authorities. She was rushed to the hospital and was later pronounced dead at the scene.
Officers and a mental health specialist were called to the home at 11:45 a.m. Thursday by the landlord, who was concerned about a woman's well-being.
"At the time [of the shooting] there was an LA County mental health clinician here with the officers", Lt. Joe Mendoza, of the L.A. Sheriff's homicide bureau, told reporters at a press conference. When they arrived, she was suffering from seizures and appeared unable to take care of herself.
Mendoza said the woman, who sources identified as Marquez, "was undergoing some medical problems, some seizures, [and] it appeared that the female was gravely disabled", according to the report. "The fact that I couldn't affect her career is only surpassed by the fact that I wouldn't".
The Los Angeles Sheriff's Department is investigating the incident, as is protocol for all police-involved shootings, according to the report.
Prince Harry sings King George's line at Hamilton charity show
Joining Harry on stage afterwards, Mr Miranda said: "Smash cut to 2018 I'm sitting next to his sixth-great grandson". Harry and his wife, Megan Markle, were attending a charity performance of the hit musical " Hamilton ".
Last year, Marquez publicly accused the Oscar-winning actor and director of playing helping blacklist her after she spoke out about alleged harassment on the set of ER, including being subjected to racist and sexist remarks.
In response, the police claim, they opened fire, at the time unaware that Marquez wasn't brandishing an actual handgun. She started another account where she began attacking Twitter CEO Jack Dorsey. In the show, Goldman is a nursing assistant in the County General ER.
After leaving ER, Marquez appeared in three episodes of the sitcom Malcolm in the Middle in 1999, followed by a few more roles in TV films and shorts. Her account was mostly retweets of anti-Donald Trump posts.
"A person only has so much strength and I'm afraid I've used all mine up", she wrote at the time.