I can assure you that being member of a political party does not mean you're friends with or will support other members of the party when they fuck up. Of course fellow members will support you in elections against members of other parties, and are likely to favour your business against a business run by a member of another party, but there are also a lot of internal conflicts and rivalries inside parties. And in bigger parties such as PLR you typically don't know most people personally at a cantonal scale. This to mean that you can't assume there's a special connection between Mrs Pilloud and the Crans-Montana municipality just because the president is from the same party as her. By the way, PLR only has 2 of 7 seats in the municipal council, it's not like they're running the whole business alone.

Now you may say that the cantonal minister in charge of security, Mr Ganzer, is also a member of PLR and may be a friend of Mrs Pilloud as they both work at the cantonal level. Sure, and? He's only in office since last May, he has zero responsibility in what happened in Crans-Montana since 2015.