As SteveP said, I'm sure Harford has communicated with the LA PD over this in great detail.
I'm not sure Harford Co PD would write off a vehicle, if one was spotted in the CA incident.
What I can't get my head around on this forum is why some are focused on what took place inside that house in LA - whether he knew the young girl, was invited in, if others were there, why he seemed to leave with a quick wave goodbye, etc. I mean, it's intriguing, but our focus is Rachel, and it's not like the specifics of his California crime would lead us to being able to identify him more quickly if we knew exactly why he was in the house in LA. Whether there was an SA in California or not, I'm not picking up on any "pattern" that would lead to an identity. Young girl in a house, home invasion, vs Rachel on a walking/jogging trail, an almost 40 YO adult, etc. If anyone can help me understand why some are focused on those details, do fill me in.