The police will often change direction on a case. Or they will simultaneously be carrying out multiple lines of enquiry.
Don't even think Jeremy's case was a change of direction. The official line to the media on the day was murder/suicide. But behind the scenes experts were looking at the crime scene, the relatives were suspicious & Julie was breaking.
Jeremy doing himself no favours by going on multiple jolly ups, leaving WHF unattended & trying to sell photos.
It was only a month until he was charged.