Heffernan became the second Kilmarnock player to score a hat-trick at Tynecastle this season, matching the absent Cillian Sheridan's tally from earlier in the campaign.
The striker gave his side a 1-0 half-time lead, before a six-minute second-half double settled the contest. The win moves Kenny Shiels' side into fifth after winning their third league win in four.
- Sports & Recreation
- Cillian Sheridan
- Kenny Shiels