When I read "police source" I think "detective on the case," which is of course what they want you to think. But it's more likely to be a loose-lipped dispatcher, the officer at the front desk, the attendant at the lot where the cops park their cars. When we had a serial killer around here, it turned out several LE leaks were from the retired part time officer who had been called on to direct traffic half a mile from the crime site. Media identified him as "an officer on the scene," which was technically correct.
At this point, the only things I'm taking as probably factual are the descriptions and information on the reward poster.
Re the reward poster, the ones I saw had a photograph of the home on them.
Were there any reward photos released with either the victim's photo and/or the still of the perp?