he volunteered to help. >> my kids would ask, how is your day? i'd tell them i've been dumpster diving all day. didn't sound like a real respectable position, but that's what we do. >> we realized we needed 24/7 surveillance coverage of chi mak and his wife. we needed to understand where chi mak was, who his associates were, how he got from one place to another, where he went and what he did when he went to those locations. in order to do that, you have to rely on just good old-fashioned physical surveillance. >> chi mak's life revolve around his work. he didn't have a social life, that we could see. he didn't even keep in much contact with his brother tai mak who also lived in los angeles close to chi mak. he and his wife would spend long hours in there. rebecca wouldn't leave the white house without him. rebecca would look out her window every day and spend lots of time in the house. we felt she was protecting