But out here killers and bandits tend to be territorial.

Serial killers, on the other hand, tend to be more complex.

The classic profile says serial killers tend to be white men.

Like the Italians, the killers tended to be young, but family honor was not usually at stake.

In both of them, the killer buried his spousal victim in her garden and then tended it, growing a really spectacular crop.

There is one major difference, however: the transvestite killer actually kills his victims, and tends to stick around to make sure they are really dead.

Mysterious killers tend to create more panic.

Psychotic killers tend to be memorable.

They say serial killers of prostitutes tend to be the most vicious murderers of all, slashing or otherwise mutilating their victims, not leaving them unscarred.

But because the killers of blacks tend to be black, that also means that Philadelphia's death row has the highest percentage of African-Americans in the country.