If the 1st attempt were unsuccessful the perp would know he's been reported and that LE is looking for him in the first area so it's more than likely that he would "get out of dodge" and maybe even get to a different state.
Also migration can be part the pattern of escalation, increased confidence etc iirc, looking for link:
Eta:
“Myth: All serial murderers travel and operate interstate.
Most serial killers have very defined geographic areas of operation. They conduct their killings within comfort zones that are often defined by an anchor point (e.g. place of residence, employment, or residence of a relative). Serial murderers will, at times, spiral their activities outside of their comfort zone, when their confidence has grown through experience or to avoid detection. Very few serial murderers travel interstate to kill.
The few serial killers who do travel interstate to kill fall into a few categories:
• Itinerant individuals who move from place to place.
• Homeless individuals who are transients.
• Individuals whose employment lends itself to interstate or transnational travel, such as truck drivers or those in military service.
The difference between these types of offenders and other serial murderers is the nature of their traveling lifestyle, which provides them with many zones of comfort in which to operate.“
Serial Murder
——-
Which brings me to another great article I seem to end up posting a lot on websleuths, re: “Awareness space” from Jessica R’s Case, definitely worth a read imo for those who haven’t seen it already:
Jessica Ridgeway: Killer’s ‘awareness space’ may lead to clues
http://www.boulderweekly.com/news/j...-lsquoawareness-spacersquo-may-lead-to-clues/