Maybe the FBI crime tape is on his door to keep her family out since they already took things (electronics) that maybe could have been evidence?
That very well may be the case.
Or maybe the yellow FBI evidence tape is on the door was to keep
everyone out of the condo because the FBI considers it a possible crime scene (whether due to the family possibly taking things or something else):
May 23 - 8:30 p.m. - neighbor said
she saw official-looking men with latex gloves and Bennett out by his car (BBM)
May 24 - another neighbor was walking his dog and saw Bennett bringing stuff out. He had someone helping him. They were throwing stuff in the dumpster.
May 26 or 27 - CBS 12 visited the apartment.
No one was home, but two boxes marked evidence were left on the front stoop-- one was open at the top, and they could see inside. The item looked like a piece of inflatable marine equipment, possibly a life-vest. (BBM)
We don't know for sure who the "'official-looking' men with latex gloves" were. Besides, this is third-party information coming from a neighbor.
However, for the sake of this post, let's say they were from the FBI.
The next day, another neighbor observes Bennett and another individual "throwing stuff in the dumpster." Again, a third-party account. Also, Bennett might have decided by then that he would be out of the country for an extended period of time, so perhaps he was simply clearing his refrigerator? I don't know.
The following day, a MSM source observes evidence boxes outside the condo. Maybe the FBI had gotten a warrant to search the residence, or Bennett had agreed to have it searched voluntarily. Either way, it sounds like to me the authorities were gathering evidence as part of their investigation into Isabella's disappearance, and/or the purported break-in and theft on the part of her family.
We do not know the entire scope of the joint investigation by the FBI and the USCG, and that is what makes it difficult for me personally to decide what the tape on the door is for. My best
guess, however, is it wasn't just for the alleged break-in and theft by Isabella's family, and that the FBI does not want anybody going inside, whether for the duration of their investigation, or at least for the time-being.