Hello, Dutch Treat
[Re: Sightings of suitcase man / timeline]
I agree, it's strange.
On that information, there are two possibilities:
1. 'Suitcase man' was the person who originally planted the suitcase, in March, or some time before March (without being seen). He then returned to the suitcase, as witnessed, in April and May, carrying it around for a bit then setting it down again each time.
(What at reason could a person have for doing those things? Why would the person who planted the suitcase, knowing, presumably, what was in it, need to come and look at it again on two further occasions? He wasn't returning to move it to another location, as it was on the same part of the highway all the time, as witnessed by the many other people who stopped to look inside it.)
or,
2. The suitcase was placed there by someone other than suitcase man, but suitcase man took enough of a shine to it to pick it up and walk around carrying it - we can't say if he opened it or not because there was no witness to this - on at least two further occasions.
(If he wasn't the person who planted it, what was so important about it that drew him to journey back to it? It's not as if he was a local who happened to be passing by on his daily walk. He made the trip specially, possibly from far afield.)
It's all a bit contradictory!
ETA: Can we be sure that the two sightings of suitcase man are indeed of the same person? The description of the man is pretty general. It would make much more sense if it were two men who were just random members of the public, curious about the suitcase's contents.