Criminals that don't tend to get caught and leave little to no trace tend to be professionals, IMO. They have no connection to the victim, and ensure that they don't leave one. In this day and age, they'd also know how to research, navigate, and circumvent the digital world, and perhaps even contributed to its development and/or enforced its security protocols at one time. If they wanted to setup a digital crypto account that is untraceable, they could. If they wanted to spoof an IP and swat an unsuspecting immigrant delivering food 40 miles to the South, they could.
Indeed, they may not just be criminals. They may be agents of some kind and from some place. Either way, the arrogance is palpable.
And the silence, deafening.
JMO.