Complex sentence: Detective Whitney was able to tell Terri's father that they had solved the case, even though Mr. Brooks was on his deathbed it brought him great relief that his daughter's murderer was brought to justice 15 years after her death.
Split into simpler sentences: Detective Whitney was able to tell Terri's father that they had solved the case. Even though her father was on his deathbed, it brought him great relief that his daughter's murderer was brought to justice 15 years after her death.