I have no evidence to back this up, but I believe that LE hadn't even thought of Heinrich in 24 years, and it was the Paynesville connection that made them take another look at him.
Your original statement, shown in red above, is what I responded to. It was a very broad, generalized statement, and therefore would require careful dissection to accurately answer.
For the sake of being brief, there were four main groups of LE involved - Paynesville Police, Stearns County, The BCA, and The FBI. I'll address each individually:
Paynesville Police - When you read the court documents and study the timeline in "Answers In The Sand," it's pretty clear that the Paynesville Police led the way when it came to the Paynesville assaults, Jared's case, and Jacob's case. Danny Heinrich was clearly on Paynesville's radar for the Paynesville assault cluster, and that's why Heinrich stopped for a time, then moved his activities out of town. Jared was abducted 1/13/89. Three days later, on 1/16/89, Paynesville Police, through a Stearns deputy, informed Stearns County investigator Doug Pearce that Heinrich should be considered a suspect in Jared's case. Paynesville Police once again fingered Heinrich for Jacob's case soon after he was abducted. Now, some media, as well as Joy Baker and Patty, have promoted the idea that the Paynesville police did not properly follow up on the Paynesville cases. The evidence strongly suggests otherwise. Media accounts, particularly those of Jenna Ross, have touted this without providing and factual basis to support it. If there is such a basis that anyone is aware of, please present it here. There were at least 5 references to the Paynesville cases in the Paynesville Press, all of them sponsored by the Paynesville Police.
Stearns County - Stearns was aware of the Paynesville cases early on, IMO. The very first Paynesville Press article, in 1986 I believe, that addressed the Paynesville assaults, asked people to call the County's Crimestoppers number with tips. That's a strong indication that Paynesville had reached out for help from the beginning. Also, there was a Stearns County sub-station in Paynesville that was staffed by sheriff's deputies. I don't have proof that it still existed in the late 80's, but it was there throughout the 70's and much of the 80's. Stearns had fast, easy access to issues going on in Paynesville. It's my opinion that Stearns only lost sight of Heinrich in 2003, when Kevin came forward. As I pointed out in the book, the change in theory of the case corresponded with a change in Sheriff. Remember also, that when Sanner was proclaiming a car was not likely involved, former Sheriff Kostreba contested that notion, but it was subtly ignored.
BCA - Here is something that nobody in media has pointed out, and it amazes me. On July 8, 2012. The BCA got DNA results back on Jared's clothing, and found that there was an unidentified male. That means that the clothing was sent in for testing some time before that, perhaps a year or more. The net result is, the BCA, whether at their own behest or that of Stearns County, was actively seeking the perp in Jared's case and related to Jacob's. It would be very interesting to learn who was driving the bus on this, because by then Stearns was saying the cases were not related. Also of note here, is that this clothing was being tested long before myself, or Joy Baker had been talking to Jared or about the Paynesville cases.
FBI - Obviously the FBI knew about Heinrich from the beginning, as they moved to arrest him. Stearns County resisted, and I think it's because they realized their evidence was weak due to possible contamination when that had Jared sit in the back seat of Heinrich's car two days before they sampled for fibers. The other key here is that it was the FBI that settled on Heinrich, not Stearns County. All the Paynesville case tips coming in from Joy Baker went to Stearns, and Stearns has said many, many times that they were well aware of the Paynesville cases. Sanner said it, the newspapers said it, and Stearns Attorney Janelle Kendall said it. They actually had a name for the Paynesville cases, as Kendall described when she said "the Paynesville Assault Cluster, as we've referred to them for years." It was the FBI that opened up the files and within days settled on Danny Heinrich as the perp in all the cases. It's no secret that all of Baker's efforts centered around Duane Hart, she told me that herself several times, and it was quite apparent in her blogging, in interviews Jared did on TV, etc. Remember the podcast that was published? It was actually mentioned during the podcast that Jared's dad knew Duane Hart (I did not include in the book because I felt it was tacky).
On a side note, some media had suggested the Paynesville cases were never investigated for Jacob's case. Absolutely untrue, as we all know now. I recall one criticism being that only two police reports of the Paynesville incidents were kept, and only two children talked to by investigators. Some media would have you believe that this was oversight by LE, and sloppy work, that kids were ignored. Baloney. I've read those two police reports, and they were very detailed and specific. I'm sure that investigators looked at all of these reports and selected the best two based on the details offered in those reports, and talked to those 2 kids. This would also be done to spare some of the kids from having to talk about it. This selection process would have been based solely on the quality of the information in the reports, and not on whether or not the child was willing or wanting to talk about what happened to them.
Bottom line, be very wary of conclusions that are drawn from media coverage. I've worked with every major media outlet in the Twin Cities except for Channel 5 (even though they were all "banned" from speaking to me, they all did so anyhow - it's actually been quite comical, really). Some of these stations were reprimanded for doing so, and maybe someday that story will be told, we'll see. While most reporters "talk good," and present themselves as qualified professionals, most of them are really clueless on the Wetterling case. Some are worse than clueless, actually, and that's kinda scary. Most often, it's because they're all competing with each other, duplicating each other's efforts, etc - very little original or thought provoking reporting or investigating going on, IMO. Some reporters, unfortunately, just aren't very smart.
Now, I will say that it was probably the Paynesville connection that prompted Patty to ask Stearns / BCA / FBI to look at the case again. But, that's because Patty said she didn't know about them previously. Obviously, all of LE knew about them. Human remembered them when she posted about them in 2010. I found out about them in August 2013, as did Joy Baker, as did JBrown. Why didn't Patty know? It's because the families of victims are not kept in the loop about all suspects as much detail as many of us would be led to believe. Mostly, families are informed of imminent arrests or threats, or leads followed up on dismissed, etc.
IMO, Stearns coddled the Wetterlings over the years, and in doing so sidetracked their own investigation. The FBI did it right, work the case, tell the family a day before the arrest, and take care of business. Sorry to those who disagree or think it's heartless - it's what it takes to get the job done correctly.
Sorry for rambling...hope this all makes sense. Holler if questions!!