It is not a fact that MW never did a side job. Only she would have known that bit of information. She had been prostituting for over a year when she was murdered. She is said to have met AC through friends. Many of her acquaintances have ties to men out of Brooklyn, NY. Per a court ordered custody agreement, the father of her daughter (2006) is "unknown."
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We don't even know if she was doing similar activities before she met AC. It's unrealistic to believe that one goes directly from working a low paying job, without some incremental steps in between, to having a pimp, meeting clients in a motel, selling drugs, etc.
The FACT is we don't know if MW was a street walker before she was hooked up with AC. Nobody, here, knows that to be a fact.
Research per news articles/announcements and court records show that MANY of MW's friends and family members have arrests for drugs and a few for other crimes like assault, concealed weapons, etc. There is a recent case out of South Portland, where a street walker with priors (prostitution, weapons, assault and drugs) was beaten nearly to death off Cumberland Ave. That women is the cousin of an associate of MW. There is another case of a women, now in Florida, who self-described herself as a "good friend" of MW. She is a FB friend on both of AC's FB pages. She was arrested a few times too.
We are not privy to which one of MW's friends or family members set her up with AC but a few of those in her close circle have some very close ties to Brooklyn guys.
It would not be a surprise to find that someone felt she would be safer with a guy like AC then out there on the streets of South Portland. This girl, Sherri York, was out on the streets and this is what happened to her.
http://www.pressherald.com/news/Scarborough-man-faces-new-charge-in-assault-on-woman.html
http://www.wgme.com/news/top-stories/stories/wgme_vid_13292.shtml The comments are very informative.