Murphy scored four times in a 6-3 win to make himself leading marksman in the Island with seven goals for the season.
Scott Quarrell and Danny Craven also notched for the winners with Tower replying twice through Mark Lucas and once through Jon Carter.
Portuguese Club and Jersey Nomads joined Jersey Wanderers, who were without a league match, on nine points in Division II after both won.
Portuguese returned 4-2 winners from previously undefeated St Martin/SCF while Nomads won by the odd-goal in five against Beeches Old Boys at the FB Fields where Nomads’ Adam Budworth unfortunately broke a leg.
Carlos Figueira hit a brace and Saam Khakazan and Freddie Mendes singles for Portuguese as Paul Stier and Danny Hawgood registered for St Martin/SCF.
Jamie Shaw and a Nomads defender were on target for Beeches while Steve Holt bagged a brace and Ged O’Donoghue a single for Nomads.
St Brelade won their first league match since being relegated, 5-1 at home against Sporting Academics after a hat-trick by Ollie Nightingale and a double from Dave Fitton.
Phil Helleur replied.
St Clement also won for the first time, 6-1 at home to St Lawrence following four goals from Beau Waugh and singles by Ciaran Hocking and John Murray.
John Patterson replied.
Division I Reserves champions St Peter increased their lead at the top of the table to five points without kicking a ball.
Scheduled opponents Jersey Scottish scratched after being unable to field a side because the first-team pulled on their players because of injuries, a stag party and players away watching the Celtic and Rangers match.
Second-placed First Tower lost ground after they drew 1-1 at home to Grouville.
Michael Texeira and Sam Baldwin for the hosts and visitors respectively at La Hague Manor.
Jersey Wanderers moved into third place after Nelson De Freitas scored all their goals at the Hockey Club in a 3-0 success against Trinity.
Sporting Academics remain bottom following a 4-3 defeat away to St Brelade.
Chris Rock (two), Brian McBride and Tony Barnes netted for the winners and Ged Horgan, Robbie Landers and Rikki Morgan for the losers.
St Ouen moved to the top of Division II Reserves, on goal-difference from Magpies and St Martin/SCF, after they returned 6-0 winners from St Saviour against St Paul’s, the latter who had David Tonner sent off for alleged violent conduct.
Ben Burton grabbed a hat-trick and Dave Evans, Adam Sansom and Shane Carré one apiece.
Neil Brédonchel and Paul Kemp both scored twice as Magpies and St Martin/SCF shared four goals at the Airport.
St Clement bagged all their goals in the first half to defeat Jersey Nomads 6-1 at St Clement.
Adam Claxton hit a hat-trick, Jason Kelly scored twice and John Jenkins once; Nomads replying after the break through Martyn Jubb.
Jerry Vieira and Pawel Wydro were on the mark helping St John to a 2-0 home win against Beeches Old Boys.
Chris Crombie converted St Lawrence’s consolation from the penalty spot in a 4-1 home defeat by Portuguese.
On target for Portuguese were Valeriano Figueira (two), Daniel Maciel and Elson Delgado.
