It's hard to say for sure based on your picture, but the weed looks like nutsedge! My condolences. It's very hard to control.

here's another photo from the bed

Looks like yellow nutsedge to me. If you pull one up and roll it in your fingers, do you feel 3 edges? Remember that sedges have 3 edges. They are neither a grass or a broadleaf weed.

Nutsedge produces hundreds of thousands or millions of tiny tubers or "nutlets" as part of its rhizome network. The tubers are viable for years and can germinate at almost any time.

They are controlled with herbicides like Halosulfuron methyl (Sedgehammer).

Definitely has 3 sides. I'll proceed with the appropriate herbicide. Thanks so much...

No problem! Just note that Sedgehammer has long persistence in the soil. I remember reading that it can remain active in the soil for up to 3 years. I would avoid vegetable beds, etc.