About Evidence VS Summoned

[Yaso]

http://www.salemwiki.info/index.php/Evidence
"which can be used to summon them online if it is a summonable Crime"
ask:
- when player online is only option for summonable? is right ?

http://www.salemwiki.info/index.php/Trial_by_Combat
"Once the Trial is underway, any homestead under the trial with active scents maybe be summoned as if the Trial itself were his homestead."
ask:
- mean, if only "scent active" ?
because Evidence (in inventory) live 90 days ?
so when i leave Larceny (Theft) - scent exsist 9 days
ASK: summonable is possible for max 9 days ? or max 90 days ?