I've found articles in which Keela was supposed to go (dating from late 2006, from memory). So I see no reason why he wouldn't have taken the opportunity to take Eddie as well and let him have a sniff around the Body Farm.
I have no reason to doubt that Eddie did go, simply I haven't found any confirmation of it.
Gurgle.
There are heaps of reasons.
Not least that Eddie, at the time, would have been 5 or 6 and 18 months from retirement as a police dog.
And we (in England) don't use human remains to train dogs because we regard it as unethical. Why (on earth) would we (in England) indulge both the expense and hypocrisy of sending dogs to America to be trained in ways outlawed as unethical in England?
And especially 18 months from retirement.
Grime went to America [ deleted ] to discuss Keela, in whom the Americans had taken an interest.
The contemporaneous press reports of that (then forthcoming) visit say Keela went to America to
assist the FBI in two murder enquiries.
Those reports say nothing about Eddie (then unknown outside police circles.)