There is another reason why we have not been told if anyone else came up on this analysis, and that is because no one else did come up on it. Applying Occams Razor , here, that is a reasonable explanation. 'We' don't know about who threw the phone, because VICPOL maybe does not know for the purposes of prosecutorial evidence. We do know that Samantha did not throw it. It is therefore rational to assume that either her killer threw it, or he gave it to someone who threw it and that will eventually iron itself out , one way or the other.Not necessary so, especially If others are being watched or involved in other crimes that could be under surveillance as well.
Police might suspect others, but they need the proof, more might be revealed at the committal hearing, but the details may not be revealed until the actual trial.
He may not have been the only person who came up in this analysis, and police may have been working on other 'more likely' leads. If there is more to this, the police certainly wouldn't be rushing, and we won't be told a thing
We still don't know if the accused has thrown Samantha's phone into the dam, that could have been someone else
Again, 'we' can't be told, because VICPOL is bound by the laws of Victoria and under the auspices of the Supreme Court of Victoria to Not Publicise Elements of a Murder to the General Public, which is you and me. You and I might be safe with info but a lot of people are not, and therefore, VICPOL and every other police org in AU is not permitted to try cases they are prosecuting In The Press. I don't know how to make it any plainer than this, really..