Death of the new hive... a guilty post-mortem

I am terribly sad to say that I'm not a bee-keeper, but a bee-killer. Opened the new hive up today, clearly far too late this spring for such a young hive, such a warm winter, and it is tragic to report but they have all died, starved to death it seems. There is a large pile of bodies and many were head-down, trying to scrape out the last of the honey at the bottom of the comb when they died. Clearly, my ignorance and lack of experience is the cause, I should have realized that they didn't have enough stores to go so long, but it is sheer stupidity that I now bitterly regret that I didn't open up the new hive earlier.... I had checked in on the "mother" hive in early February and they seemed to be doing well with lots of honey left, but this new one didn't have the same back-ups, and I should have been feeding them probably back as early as January. I am so sorry to everyone concerned.