She was in the first few seasons of ??ER?, and prior to that, appeared in the movie ??Stand and Deliver?. She was also a singer, and an episode of ??Intervention? features her struggles with OCD, shopping addiction, panic attacks and depression. I wasn??t there but this sounds like suicide by cop:
https://wgntv.com/2018/08/31/former-er-actress-vanessa-marquez-shot-dead-by-police/
Song ??I Want You To Know? with back-up vocals by Justin Timberlake:
https://youtu.be/YMMG-Muf4s4
On ??Intervention?:
https://youtu.be/ZLV75e2kJNs