obstacles was there were really no good photographs of bulger or his longtime live-in girlfriend catherine greiga former dental hygienist. the fbi often noted that the couple shared a love of animals, especially dogs and cats, and asked veterinarians to be on the lookout. there were reports that greig once had breast implants and other plastic surgery in boston, so the task force reached out to physicians. eventually, they got a call from a dr. matthias donelan, who had located her files in storage. >> macdonald: i was trying to leave the office a little early to catch one of my kids' ballgames. and i said, "well, listen, i'm going to swing by in the morning and pick those up." and they said to me, "do you want the photos, too?" and i said, "you have photos?" and they said, "yeah, we have photos." i said, "we'll be there in 15 minutes." >> kroft: the breast implant lead produced a treasure trove of high-resolution catherine greig photographs that would help crack the case. the fbi decided to switch strategies, going after the girlfriend in order to catch the gangster. >> this is an announcement

"carol gasko" was actually catherine greig, whitey's longtime girlfriend and caregiver.ow they managed to elude an international manhunt for so long while hiding in plain sight is interesting. and tonight, you'll hear it from the gaskos' neighbors, and from the federal agents who finally unraveled the case, with the help of a boob job and an alley cat. if you're forced into retirement, with a comfortable nest egg and a desire to be left completely alone, there is no place better place than santa monica, california. this low key, seaside suburb of l.a. is shared by transients and tourists, hippies and hedonists, celebrities and lots of senior citizens attracted to the climate and an abundance of inexpensive, rent-controlled apartments just a few blocks from the ocean. places like the princess eugenia on third street, which is where charlie and carol gasko, a childless couple from chicago, lived for 14 years without attracting much attention from longtime neighbors or landlords. josh bond is the building manager. what were they like? >> josh bond: they were, like, the nice