a burn pattern at the point of ignition

着火点的焚烧痕迹纹路
indicates that the arsonist reverted to using

表明纵火犯又回归到了
the jug-and-flare system to light the fire.

之前的"火壶纵火系统"的模式
Yeah, the jug-and-flare system used back in the seattle fires.

对就是之前在西雅图的火壶纵火系统
The arsonist had graduated to this electronic

纵火犯来到波特兰之后
"botched fuse" system once he came to portland.

一直娴熟使用"电熔插入式保险丝"系统
Well, he had, until now.

的确直到这一回
Which is why the development is so surprising.

所以这个发现才如此惊人
Jugs and flares point to our fire artist, Norburg,

"火壶纵火"就指向了纵火专家诺布格
but she was in custody when the last fire was set.

不过上次纵火案发时她正在被羁留
Where's a picture of this "newfangleduse" system?

这个"新式乱七八糟"系统的照片在哪
Uh, no, I don't have one.

不我没有