The attacker's name is Donald Kercell, a 49-year old. I searched for his name and found this SacBee story from 2007, and archived in a library service.
Kercell is a 48-year-old resident of Rio Linda. In his youth, he discovered two things. One was that he had a talent for working with concrete. The other was methamphetamine.
The former, coupled with an impressive work ethic, kept Kercell gainfully employed much of the time. The latter put him in prison.