Despite the fact that Shipman’s killings increased in frequency, he would occasionally slow down because he feared detection. If killing was an addiction, therefore, it was initially a controllable one.
He once stopped killing for two years after one of his victims he believed dead, actually groaned in front of relatives, and didn’t die for another 24 hours. When he tried to kill in February 1994, his victim again didn’t die quickly.
But this time he waited only two months before killing again...