OAKLAND -- A 23-year-old Alameda woman was sentenced Thursday to 25 years to life in prison for killing a drug associate in Oakland last year.

Victoria Martinez pleaded no contest to first-degree murder for shooting, bludgeoning and strangling 44-year-old Curtis Williams inside his RV parked in Oakland's Meadow Brook neighborhood on July 4, 2012. Martinez told an acquaintance earlier that night that she planned to kill Williams because he owed her $20 and she was sick of him taking advantage of her, deputy district Tim Wagstaffe said.

Defense attorney Tom Worthington said that Williams began suppling methamphetamine to Martinez while she was in a low point in her life and, once she was deep in the throes of addiction, he began demanding sex in exchange for the drug. Worthington said Martinez planned to confront Williams that night and she is horrified that she ended up killing him.

Contact Malaika Fraley at 925-234-1684. Follow her at Twitter.com/malaikafraley.