Complex sentence: While in high school, however, tragedy struck when one of his best friends was killed in a car accident; a grieving Cardall spontaneously composed a musical tribute, going on to write a dozen more songs and in 1995 privately pressing an album.
Split into simpler sentences: While in high school, however, tragedy struck when one of his best friends was killed in a car accident. A grieving Cardall spontaneously composed a musical tribute, going on to write a dozen more songs and in 1995, privately pressing an album.