Did Esmeralda Kill Phoebus?

He is immediately sentenced to death for his rebellion and, after attempting to escape from Frollo and his men, is almost killed by being struck by an arrow and falling into the River Seine, but is rescued by Esmeralda from drowning.

Why did Frollo kill Phoebus?

So essentially, Frollo stabs Phoebus because he is insanely jealous of him due to his obsession with Esmeralda. He also uses the incident as a way to frame Esmeralda for murder so that he can try to take her again while she's imprisoned.

Does Phoebus die in the musical?

The finale of act one shows Phoebus' plummet from a bridge over the Seine after being shot by an arrow.