Wearing gloves and dry shoes to break into a house through a window is indicative of an extraordinary attention to detail? Really?
As for the rest, what if....what if..... the intruder entered the flat believing that he would be able to look for valuables undisturbed for at least, say, half an hour, given that it was a public holiday and there was nobody at home.
What if he then decided to use the toilet - possibly as a result of having eaten a kebab earlier that evening, possibly as a reaction to the adrenaline rush of the entry into the house, possibly as a subliminal form of territory marking?
What if one of the occupants of the house unexpectedly arrived back while the intruder was sitting on the toilet?
What if the intruder decided not to flush so as not to alert the newly-returned occupant to his presence?
What if the intruder tried to sneak quietly out of the front door, but found that it had been locked shut by the returning occupant?
What if a confrontation between the intruder and the occupant then took place, perhaps triggered by the intruder's demands for a key to be able to unlock the front door?
What if this confrontation then quickly escalated into a violent sexual assault, with the intruder wielding a knife and stabbing the occupant in the neck when she resisted?
What if this new turn of events completely changed the mindset of the intruder? What if he was now far less concerned with undertaking a methodical search of the cottage for valuables and cash? What if he was now chiefly concerned with cleaning his murder victim's blood from himself and getting away from the scene?
What if the intruder had blood on his hands, arms and clothes, and went to the small bathroom to wash himself? What if he removed a shoe to wash his trouser leg, then stepped in a blood/water mix pooling in the bowl of the bidet and then stepped onto the bathmat?
What if he then replaced his shoe(s) and returned to the murder room to take the phones, keys and credit cards? What if he then inadvertently stepped in the victim's blood on his way out, but was too focussed on getting away from the house to stop to clean up any more?