I seem to recall in the early weeks of the West Mesa grave dig that some were suggesting that a gang who initiated members by killing women were involved. That wouldn't be a far-fetched possibility; one of the credible theories in the murders of women in Juarez, Mexico was that two violent gangs killed women to initiate members. Interestingly, Albuquerque and Juarez, Mexico are pretty close and the Juarez Drug Cartel controlled the drug trade in New Mexico for many years (according to drug war blogs).
I understand it's easy to pin this on Lorenzo Montoya, and that would make sense considering his violent history toward prostitutes. I should mention that three women did disappear in Albuquerque between 1998 and 2001 (before the West Mesa victims disappeared) and people connected to narcotics were believed to have been involved in their disappearances.
Teresa Reyes (17) (July 1, 1998): Mentally challenged girl who disappeared after presumably going to a party hosted by five young men.
A detective visited a business in 1999 where a caller claimed that a woman resembling Teresa had been seen near a motel with a Cuban drug dealer known as "Oscar". Authorities located a woman named Monica who was with Teresa and "Oscar" at the time of the sighting. Monica believed that Teresa was a prostitute who was working for "Oscar".
http://www.charleyproject.org/cases/r/reyes_teresa.html
Betty Vigil Garcia (34) (December 25, 1998): Last seen at the Drift-In Lounge. Believed to have been in the company of two men that were involved in narcotics at the time of her disappearance.
http://www.charleyproject.org/cases/g/garcia_betty.html
Darlene Marie Trujillo (20) (July 4, 2001): Last seen dropping off her son at his grandmother's residence. Darlene was accompined by a heroin dealer named "Jorge" at the time of her disappearance. "Jorge" returned to Albuquerque without Darlene a few weeks later. He told Darlene's aunt that he and Darlene did not go to Arizona like planned but to Tucumcari, New Mexico. Jorge claimed that Darlene left in the car they had driven. Jorge is wanted for questioning by police but authorities haven't been able to locate him.
Family members are convinced that she was abducted by Jorge and taken to Mexico. A family friend said a man who claimed to have information regarding Darlene was murdered.
http://www.charleyproject.org/cases/t/trujillo_darlene.html
http://www.nytimes.com/2009/03/24/us/24prostitute.html?pagewanted=all&_r=0
It is not hard to suspect that gangs and even drug traffickers were involved in killing women in Albuquerque. It is also possible that the Albuquerque Police Department knows this but would rather blame the murders on a serial killer then to tangle with organized crime members that could have murdered at least 11 women.