Maybe we can find the interview and actually hear what DS Bevan said.
"Man known to police
My colleague Sandra Laville was also listening to DS Bevan speak to Sky News, and brings more details:
Detective superintendent Reg Bevan said they had been searching for the man since last night and knew that his vehicle matched the description of the one April was said to get into.
He said: "The man has come into the inquiry as a result of initial actions last night. He was on foot he was walking on the side of the road he was detained by our officers...we have recovered his vehicle."
Bevan indicated on Sky News the man was known to police, and suspicions had been raised very early on about his involvement.
He said the 46 year old was a local man but would not be drawn on whether he was a known sex offender.
Bevan said his vehicle was being examined.
A major part of the police inquiry has been identifying known sex offenders in the area and the 46 year old man was known to the police.
http://www.guardian.co.uk/uk/blog/2012/oct/02/april-jones-missing-five-live
'... identifying known sex offenders ... known to the police...' does not say that he was known to the police as a sex offender, could be for something totally different.