A former counter-terrorism officer transferred to Anti-Corruption Unit 12 (AC-12) after refusing to cover up an unlawful shooting by his team. He is partnered with DC Kate Fleming and works under Superintendent Ted Hastings to investigate police corruption.
Steve becomes part of the effort to expose Gill's manipulation of the anti-corruption investigation.
Steve and colleagues discover that Gill was involved in selecting Corbett for Operation Pear Tree and then interrogate her.
Their relationship represents the confrontation between AC-12 scrutiny and an embedded violent criminal operator.
In Season 6, Steve investigates the wider murder and corruption case while Ryan carries out a deadly ambush and is later found dead after being pursue...
Their relationship connects an internal police interview to the later consequences of corruption and organized crime.
In Season 5, Steve participates in Maneet's interview, and in Season 6 the weapons linked to Gail Vella's murder are also linked to Maneet's killing.
Their relationship shifts from suspicion and investigative pressure toward Steve's recognition that Lindsay was framed.
In Season 2, Steve investigates Lindsay over the convoy ambush, while later becoming convinced of her innocence.
Their direct connection is created by the investigation into the attack on Steve.
Nick is questioned by AC-12 about Steve's attack and denies involvement.
Steve represents the anti-corruption investigation closing around Roz's professional and personal life.
AC-12 investigates Roz Huntley in Season 4, questions people connected to her, and remains convinced of her involvement.
Miroslav is positioned on the criminal side of an operation that Steve helps investigate.
Steve works within AC-12's operation against the organized crime group, while Miroslav participates in its meeting and is killed during the police int...
Explore the full interactive character relationship map of Line of Duty