They broke up their first interview at this point, and on the next day the commissioners ordered Philip to send Onomastus and Cassander instantly to <a class="linkToPlace" target="_blank" href="/place?placename=Rome&groupId=935&placeId=1669">Rome</a>.
Philip was exceedingly taken aback by this, and after hesitating for long, said he would send Cassander, the author of the deed, as they said, in order that the senate might learn the truth from him.
Both now and at subsequent interviews with the legates he exculpated Onomastus on the pretext that not only had he not been present at <a class="linkToPlace" target="_blank" href="/place?placename=Maronea&groupId=734&placeId=1345">Maronea</a> on the occasion of the massacre, but had not even been in the neighbourhood; fearing in fact that on arriving at <a class="linkToPlace" target="_blank" href="/place?placename=Rome&groupId=935&placeId=1669">Rome</a> this officer, who had taken part in many similar deeds, might inform the Romans not only about what had happened at <a class="linkToPlace" target="_blank" href="/place?placename=Maronea&groupId=734&placeId=1345">Maronea</a>, but about all the rest.
Finally he got Onomastus excused; but sent off Cassander after the departure of the legates and giving him an escort as far as Epirus killed him there by poison.
But Appius and the other legates, after condemning Philip for his outrage at <a class="linkToPlace" target="_blank" href="/place?placename=Maronea&groupId=734&placeId=1345">Maronea</a> and for his spirit of enmity to <a class="linkToPlace" target="_blank" href="/place?placename=Rome&groupId=935&placeId=1669">Rome</a>, quitted him with this opinion of him.
The king, left by himself, confessed in his confidential intercourse with his friends Apelles and Philocles that he saw clearly that his difference with the Romans had become very acute and that this did not escape the eyes of others but was patent to most people.
He was therefore in general quite eager to resist and attack them by any and every means. But as he had not sufficient forces to execute some of his projects, he set himself to consider how he might put off matters for a little and gain time for warlike preparations.
He decided, then, to send his youngest son Demetrius to <a class="linkToPlace" target="_blank" href="/place?placename=Rome&groupId=935&placeId=1669">Rome</a>, in the first place to offer a defence against the charges brought against him, and next to ask for pardon if indeed he had inadvertently erred in any respect.
For he felt quite convinced that he would through him get the senate to accede to anything he proposed owing to the influence the young man had won while serving as a hostage.
Having thought of this he occupied himself with the dispatch of Demetrius and the other friends he was about to send in company with him,
and also promised to help the Byzantines, not so much with the view of gratifying them, as wishing upon this pretext to strike terror into the Thracian chiefs north of the Propontis and thus further the project he meant to execute.
Walbank Commentary