放火者

例句：

1. 1. The police are investigating the case of the fire that destroyed the building.
   警方正在调查那场烧毁建筑物的火灾案件。
2. 2. He was accused of being arsonist for setting the fire.
   他被控纵火罪。
3. 3. Arsonists often target old buildings as their target.
   纵火者常常选择旧建筑作为目标。