And now we turn to the search for the missing passenger plane, flight 370. All hope resting with the unmanned submarines tracing the bottom of the ocean. As families wait, today they released a list... See More
And now we turn to the search for the missing passenger plane, flight 370. All hope resting with the unmanned submarines tracing the bottom of the ocean. As families wait, today they released a list of questions. They say Malaysian authorities had failed to answer. ABC's chief investigative correspondent Brian Ross says some of those families are feeling vulnerable in another way. Reporter: In the midst of their anguish and grief, the families of the missing passengers say they are being besieged by high stakes versions of ambulance chasers, U.S. Lawyers looking for clients. That's piling insults on to injury. And that's just not acceptable. Reporter: Among the U.S. Lawyers are members of the ribbeck law firm from Chicago led bickelly discussing mult multimillion dollar lawsuits against Boeing. We cannot wait for them to find the wreckage. Reporter: According to to two counselors the firm has been distributes business cards and brochures in Chinese to family members, something that would not be legal in the U.S. In order to protect vulnerable families at a difficult time. Caesar is a agree counselor who told us about the experience of one family member. He told me that a lawyer came to him and said you can get $1 million if the plane was confirmed as crashed. And you have to lead us to it. So sign here. Sign something so we can do something for you. Reporter: The ribbeck firm is at this Chicago high rice. But it appears to be empty supposedly being remodeled. When we caught up with the lead lawyer, Monica ribbeck Kelly she denied any of her lawyers solicit clients directly and said the families asked her to represent them. Do you think at this point before the plane is found and any bodies are recovered that you should be negotiate with these families? Is that right? It's up to the family. Do you think it's ethical and moral is and you're proud of doing that? Of course. The families may need skilled lawyers at some point. But lawyers saying what happens now is a kind of gold rush by lawyers who know there could be millions of dollars in legal fees for whoever gets there first, Diane. Thank you, Brian.
This transcript has been automatically generated and may not be 100% accurate.