Complex sentence: His daughter is later revealed to have died from the treatment, and Burke, devastated, gives ownership of the park to White and is driven to suicide with pills that are later revealed to be laced with Joker venom.
Split into simpler sentences: His daughter is later revealed to have died from the treatment. Devastated, Burke gives ownership of the park to White and is driven to suicide with pills that are later revealed to be laced with Joker venom.