Jon Burlingame editorCrime stories have been a TV staple dating back to the beginnings of the medium. And composers continue to find fresh ways to dramatize murder, mayhem, investigations and convictions, as demonstrated by series from the past year like “Only Murders in the Building,” “The Thing About Pam,” “The Dropout” and “Gaslit.”Siddhartha Khosla (“This Is Us”) came up with one of the year’s catchiest themes for “Only Murders in the Building,” the Hulu comedy-mystery starring Steve Martin, Martin Short and Selena Gomez as amateur sleuths out to solve a murder in their Manhattan apartment building.“I read the script and I heard something that felt quirky and mysterious and dramatic and emotional,” Khosla says.