The package was being delivered to my office. Said office was accessible, and there's a receptionist in the lobby. If the receptionist isn't available, several people sit within line-of-sight of the front desk. Plus, no signature was required, and they could have just left the package on the front desk.
I called OnTrac, and after ten minutes of being on the phone they said that the driver would try to get back there by 5:30 (when the office closes) but they couldn't guarantee that. It didn't happen.
Today I checked their website, and they claim the package was delivered yesterday at 3:58 p.m. That's the exact same time that they reported that they couldn't deliver it.
My conclusion: they lied about trying to deliver it, and then lied about when it was actually delivered.