Dundee United slumped to their second successive Championship defeat after being comprehensively beaten by Inverness at Tannadice.
Caley who started the day second bottom of the league table, opened the scoring through Iain Vigurs and then added a second before half-time thanks to Connor Bell.
Caley were by far the better side and fully deserved their victory while there were few in a tangerine shirt deserving of pass marks.
Dundee United boss Ray McKinnon made two changes from the side that lost 2-0 at Livingston last week with Sam Stanton and Lewis Toshney coming in for Billy King and the injured Jordie Briels.
There was a welcome return to the bench for Tam Scobbie and Scott Fraser.
Former United defender Coll Donaldson was in the Inverness starting line-up along with ex-Dundee striker John Baird.
The Highland outfit had a gilt-edged opportunity in just the fifth minute when Liam Polworth swung a free-kick in from the right with Carl Tremarco finding space and time in the home box but he directed his header straight at Tangerines keeper Harry Lewis.
The United defence was posted missing in action again shortly after when Polworth flighted a corner in from the right with Baird having a free header which he sent over the bar.
McKinnon’s men had their first chance of the match in the 17th minute. James Keatings was brought crashing down in a challenge by Brad McKay who earned himself a booking from ref Willie Collum.
Keatings picked himself up and hit a superb 20-yard free-kick which Inverness keeper Mark Ridgers acrobatically palmed away for a corner.
However, it was Caley who took the lead in the 28th minute. Polworth again sent a corner in from the right with Willo Flood attempting to head clear. Unfortunately, he only found Vigurs who hit a rising shot from just inside the box past Lewis with what looked like the help of a deflection off a home defender.
The Tangerines almost replied instantly when Scott McDonald hit a snap shot inside the Inverness penalty area but Ridgers produced a superb save to deny the striker.
Things then went from bad to worse for the Tangerines in the 37th minute when Caley doubled their advantage.
Polworth sent Jake Mulraney scampering down the right with a great pass and he hit the byeline before cutting the ball across goal to Bell at the back post for a simple tap-in.
Caley had another great chance to extend their lead even further in the 56th minute when Tremarco again found space in the Tangerines’ box but Lewis made a vital block to keep out his shot.
On the hour mark, McKinnon withdrew Paul McMullan for Stewart Murdoch with defender Mark Durnan being pressed into service as a centre-forward.
However, Caley continued to look comfortable in defence and dangerous on the break and successfully saw out the game to take all three points with the final whistle being greeted with a deafening barrage of boos from the home support.