what musical styles are implemented in their songs?
Singing, screaming vocals, and growls.
Killswitch Engage
 singing, screaming vocals, and growls
what happened to the lead singer of killswitch engage UNANSWERABLE is it an album? No, it  is an American metalcore band. which is their debut album? In Flames who is the lead vocalist? Jesse Leach what themes do their albums deal with? Unity, positivity and love
wiki:19533793
Killswitch Engage [SEP] Musical style, influences, and lyrical themes
Killswitch Engage is considered a metalcore band. Like some 2000s metalcore bands, Killswitch Engage vocally combine singing, screaming vocals, and growls in their music. In 2009, MTV, while naming "The Greatest Metal Bands of All Time", said that Killswitch Engage have been "called one of the founders of metalcore". Jason D. Taylor of Allmusic said "Alive or Just Breathing" is "a pure metal album that seemingly has ignored any fashionable trend and instead relies solely on skill and expertise to sculpt some of the meatiest heavy metal since the glory days of Metallica and Slayer." Both current vocalist Jesse Leach and former vocalist Howard Jones write lyrics that are considered positive.