This is the Woodlouse Hunter (Dysdera crocata). There is only one species in North America in the family Dysderidae, and you're looking at it. It's called the Woodlouse Hunter because it prefers to eat terrestrial crustaceans such as pill bugs, which belong to the woodlouse family Armadillidium (ooo say that name out loud!). The spider will eat other things in captivity. I haven't yet found any pill bugs to feed this one, but it is taking crickets.

The spider is introduced from Europe and Asia, as are many of the woodlice they eat. They can apparently be found over much of North America. I'm reading that they take a year and a half to mature and can live another two or three years after that in captivity — that's twice as long as the average spider. This one is immature. It's also missing a leg, which will grow back a little in subsequent molts.

Those long, heavy cones projecting out of its face are chelicerae. Each chelicera has teeth and a fang at the end. The spider chews its food by pulling the food into the teeth with its fangs. It's unusual for spiders that aren't closely related to tarantulas (the mygalomorphs) to have such forward-projecting chelicera, but there are some.