There is more than one artist with this name:
1) Dark Angel was a thrash metal band from Los Angeles. Their over-the-top style (extremely fast, heavy and lengthy songs with lots of tempo changes, lyrics and extended instrumental parts) earned them the nickname "the L.A. Caffeine Machine" and the motto "too fast, my ass". Drummer Gene Hoglan is considered to be among the best underground metal drummers in the world.
They released 4 demos until their debut full-length LP "We Have Arrived" was released in 1984. Read more on Last.fm