You make the call - T or delay?

[Cajun Reff]

Louisiana Boys Class 2A quarterfinals matchup, Team A is the home team and has the throw in on their own baseline, Team B has the possession arrow. There are two players from Team A that have reported to the scorer's table to check in at the next dead ball. Team B is up 3 points, 1 minute and change left in the 4th quarter.

A1 keys throw in, ball is caught by A2. A2 is immediately tied up by B1, lead makes jump ball call. Trail is near scorer's table and sees one of the players (A6) from Team A at the scorer's table grab the old style wooden possession arrow and turn it Team A's direction. Trail immediately signals technical foul.

Lead (crew chief), C and trail get together to confer, Trail relays what he saw A6 do at the scorer's table, Crew chief informs both teams of the Technical foul and Team A's coach asks for and receives a time out to question whether the situation warranted a technical. Crew chief tells team A coach that an unsportsmanlike technical was called and that is that.

Team B went on to win by 12pts

what say ye? Technical or delay warning?