Your local killers.

[brewer]

Not sure if these qualify as "serial".

Charles Starkweather.

Erwin Charles Simants. (20 miles from my home town)

Cecil Henry Floyd.

Robert A. Hawkins.

[ignoramus]

Simants?

You've given me an idea for a game!

[Mister Agenda]

When I lived in Fort Walton Beach back in the Eighties, we had the 'Tuesday Killer'. I met him once, took him for a thug but not a serial killer. Turned out he had Tuesdays off.

[FatAndFaithless]

Most famous one in the area of my hometown has gotta be Drew Peterson. Was suspected of killing his 4th wife, but wasn't eventually charged. However, he was charged and convicted of murdering his 3rd wife, along with trying to hire a hitman to kill a State Attorney. By the way he was a police sergeant.

https://en.wikipedia.org/wiki/Drew_Peterson

[Brian37]

I don't know of any local serial killers in my local's history. I did used to live up in the DC area so knowing the DC sniper was moving around family that still lived up there at the time was unsettling. I do know that there was a murder suicide in the house next to me 10 years prior to me moving into the one I live in now.

Bundy and Dahamer and Gacy come to mind in American history. I do think in modern times it is harder for a serial killer to get away with it long term. Most of what you see today are public shootings where a perp may start off shooting family members then off to work or public to take it out on more people. The Atlanta day trader shooter did just that. Murdered his wife and kids and mother then went to work and murdered several people there.

[Thumpalumpacus]

Not really local to Austin, but two Texas serial murderers:

http://murderpedia.org/male.A/a/albright-charles.htm

http://murderpedia.org/male.C/c/corll-dean.htm

[Gawdzilla Sama]

FBI definition of serial killer (last time I looked): Someone who kills three or more people with a cooling off period between each.

Spree killer: Someone who kills three or more people without a cooling off period.

[Aegon]

Gilgo Beach Killer

https://en.m.wikipedia.org/wiki/Long_Isl...ial_killer

Still at large!

[Joods]

I know this probably doesn't count... but being as I grew up in Baltimore - that's my area of expertise. So here we go... 

The Baltimore Crew

        

The Baltimore Crew was a faction of the Gambino crime family operating in the port city of Baltimore, Maryland from the 1920s until the 1990s. It was originally an independent organization until  installed Louis Morici as the reigning capo over the area. Throughout most of its existence it has been headed by the Corbi brothers. Vit, Pasquale, and Frank; respectively.

Frank Corbi was my mother's Father-in-Law. She Married his son, Frank Corbi Jr when I was around 10 years old. As a child, I played with the children of later generations of the Gambino family. 

Baltimore Crew Founding location - Little Italy, Baltimore
Years active - 1920s - 1990
Territory - 
Ethnicity - Italians and Italian-Americans as "", other ethnicities as associates
Membership (est.) - Around 10 , Around 50 associates
Criminal activities -Gambling, extortion, prostitution, loan sharking, fraud, drug trafficking,  and corruption.

Allies - Gambino crime family

[brewer]

When it comes to Valk, I think you spelled "your" wrong in the title.