An electric spell of reverse swing bowling from Jayden Seales inspired Sussex to a crushing three-day victory over Derbyshire in the Vitality County Championship match at Derby.
The 22-year-old West Indian fast bowler took a career-best 5 for 29 and twice struck a hat-trick as Derbyshire crumbled to 109 for 9 with Blair Tickner out injured, losing by an innings and 124 runs.
Danny Lamb paved the way for Seales' devastating spell, taking 2 for 10 after a morning score of 37 before the visitors were bowled out for 479, a lead of 233.
Any chance Derbyshire had of avoiding an innings defeat vanished when they collapsed from 71 for 2 and the match ended with Derbyshire's New Zealand fast bowler Tickner unable to bat after revealing on social media that his wife had been diagnosed with a serious illness.
Sussex had a healthy lead of 111 going into the final day and although Cheteshwar Pujara added just nine runs to his overnight 104, the lower order ensured they secured maximum batting points.
Derbyshire at least had the incentive of a new ball that was only three overs old and Daryn Dupavillon made full use of it to remove the overnight pair.
Jack Carson was tempted to cut at a wide delivery and was caught behind before Pujara was lured into an indecisive shot by a ball that moved away enough to take the edge.
But Finn Hudson Prentice and Lamb added 49 for the second wicket to push the lead towards 200 before Lamb was stumped by Morley.
Ollie Robinson drove Morley for six before chipping the spinner to short midwicket. Hudson-Prentice holed out to long on to leave Derbyshire with five overs to spare before lunch.
David Lloyd and Luis Reece survived with little alarm, but it was a different story after the interval when Seales made the first breakthrough.
Lloyd tried to pull a ball that hit him on the thigh pad and was lbw before Reece hit a big drive at Hudson-Prentice and played on.
The collapse gathered pace with Wayne Madsen lbw to Lamb looking to work through midwicket and Brooke Guest edging a drive into his stumps.
Seales then returned to the City End to turn the ball at pace and keep it low, which was too much for a side already sliding towards defeat.
His first ball bowled Aneurin Donald and the next trapped Anuj Dal in front. Zak Chappell survived the hat-trick ball, but there was more chaos in his next over.
Matt Lamb was bowled by a quick swing and Jack Morley yorked, although Seales was denied another hat-trick chance when Sussex turned to spin to improve their over-rate.
Chappell struck a few defiant blows before he was caught at wide long-on and with Tickner out, the match was over.
It was Sussex's second win of the season, but they were docked a point from their total of 24 for a slow over rate, while Derbyshire finished with three bowling points.