Dundee United manager Jackie McNamara felt his side should have been awarded a goal late in
A shot by John Rankin which deflected off Jon Daly en route to goal was clawed away by Inverness goalkeeper Ryan Esson.
However, McNamara believes the ball may have already crossed the line.
"I think you can tell by the player's reaction that they thought it was over," he told BBC Scotland.
"The angle [on the television replay] is from the main stand but it looks like it's over the line from there.
"These wee things are very important to get right. I asked the linesman and he thought that he wasn't going to guess on it, which you have to accept.
"I thought we merited the three points. This is a hard place to come and we were the better side."
United suffered an injury blow in the first half with Johnny Russell unable to fully recover from a tackle by Josh Meekings and eventually being replaced by Stuart Armstrong.
"He's very sore, we have to assess him," added McNamara.
"I thought it was a shocking challenge on him. I'm really angry about the challenge. Although he got a yellow card, I thought it could've been more."
Caley Thistle boss Terry Butcher thought referee Brian Colvin was right not to award the goal McNamara was claiming.
He said: "Ryan Esson is adamant that it was not a goal.
"I think both teams didn't do enough in the final third, but it was still a great game with good passing and movement from both teams."