Inspector Sam Lawrence is a police detective in the Chicago Police Department. He is responsible for The Commissioner's murder case.
Sift Heads - Cartels Act 2[]
Sam was behind Vinnie at that time saying that they wanted to catch live Luzio, he also explains that after the death of Commissioner, Vinnie became a "ghost", but they still managed to follow in his footsteps. Vinnie says that they would not be able to leave Luzio in jail, and it would be better if he kills himself. Vinnie then escapes the site, along with Shorty.
As Vinnie had said before, they could not leave Luzio in jail, Kate says Vinnie was right, Sam says she was beginning to wonder a criminal. She says "he settled down the organization better than we did," Sam does not care what she says and walks away.
Sift Heads - Cartels Act 3[]
At the beginning of the game, Sam appears on TV in a report on illegal gambling complex that was attacked by Vinnie and Kiro. He says he knows who did it and that Vinnie should be arrested. Once Vinnie was attacked by Shigeru, Kiro and he went to the headquarters of the Yakuza to kill him. Vinnie got out alive of Yakuza's HQ and killed Shigeru, but Sam (along with several other police) arrested him.
Sift Heads Rush[]
Sam appeared after Vinnie's prison escape, where he and Kate found out that Vinnie killed only cops under investigation and still thought to catch Vinnie to put him in the jail. In Yakuza HQ, Sam tried to decipher the computer, entering a password, but decided to take a data from computer in HDD to decipher it in the Department, no matter, if he has a warrant to take it along with other things in Yakuza HQ. Sam's penultimate appearance was in Chicago Police Department, where's one of officers is deciphered HDD and charmed Kate. Sam became curious, when he found out about Amon Rush and 14 tons of this drug in the Dock 28.
Sam's final appearance was outside of Dock 28, where he and Kate met Vinnie's crew. Sam said that he and other policemen "found 3 other corpses", which means that Sam decided to clean up the trails of Vinnie, Kiro and Shorty. Sam and Kate let Vinnie's company go with words that Vinnie and his crew are "no longer exist". Before credits, Sam said that Vinnie need to keep the car, like an evidence that Vinnie, Kiro and Shorty are really not anymore.