. >> shawny anderson and aaron hillier live in northern california and early in january the couple had loud argument and the police showed up. >> you are wanting to take my child away because we had an argument. >> they discovered a home in disarray and this. >> because the marijuana laying out here. >> the scene isn't pretty, but according to california law it's not illegal either. anderson and hillier have legal prescriptions for marijuana. >> i was pleading with them, look, you guys, i understand your perception, but we are wonderful parents, hard working. they just kept telling us, oh, no, no, they couldn't conceive of the fact that you can be a wonderful parent, decent human being, and medicate with marijuana. >> a social worker placed the couple's 11-month-old son into protective custody. we wanted to get more insight into their reasoning. but cps, child protective services, won't speak about individual cases. but here's what a spokesman did say they look for. >> is there a danger to the child. is the child being neglected. is there a safety, you know, hazard that could potential