According to his confession, he applied the handcuffs as he was putting Jacob in his car. Heinrich said he went into the driveway and turned around, facing back toward 91st Ave. I took that to mean that he drove all the way up the driveway. However, I have it from a very reliable source that Sanner is saying that Heinrich did not drive all the way up the driveway. That's a little puzzling because it means he either backed up the driveway, or he turned around somewhere in the middle. Either scenario will likely be further damning as to how Stearns shifted away from Heinrich to Rassier. The more that comes out, the worse it looks for Stearns, IMO.
That is how I interpretated as well. So throw in DR saying he saw a small blue car with a face covering person. Too confusing.