It depends on how you define prolific.The thing which is a bit perplexing to me at least is prior to 2007 CB seems to have been a prolific sex offender, only one of the charges he's facing is since then, (2017) he's done time in Germany it seems in 2016 /2017 for sex related crimes, so did the alleged murder temper his desire ? What was he doing between 2007 and 2016?
Given the length of his criminal career he has been convicted of relatively few crimes, although that might not be reflection of the number of offences committed but not detected.