Bis aufs Blut

Sule snitched on Tommy because he was already entangled in the criminal underworld and facing his own legal troubles. When Tommy was arrested, Sule was also on parole and dealing drugs. The reveal comes through Clay's backstory, Sule, like Clay, chose to cooperate with authorities to avoid serious consequences and maintain his freedom.

Tommy initially accepts the prosecutor's deal to incriminate Sule in exchange for avoiding prison, but when the moment comes to repeat his statement in court, he cannot go through with it. He chooses to return to prison rather than betray his lifelong friend, even though Sule had previously betrayed him. The decision represents Tommy's moral turning point, he refuses to become someone who destroys others to save himself.

After Clay is attacked by two Americans in the hospital, he tells Tommy the truth about his past: he was a gang member in Los Angeles who snitched on a comrade to avoid jail time, then joined the army to establish a new identity. This revelation shocks Tommy because it shows that someone close to him, a friend, could be a snitch, mirroring Clay's own history. Tommy realizes Sule is the snitch.

Sina offers Tommy a second chance because she sees potential in him beyond his criminal past. After the confrontation with Sule and the cafe incident, she meets Tommy at a cafe to reconnect, representing the possibility of a different life, college, stability, and a legitimate future. Her support becomes crucial to Tommy's decision to pursue an honest path, even when that path leads back to prison.

The auto body shop represents Tommy and Sule's shared dream of escaping the cycle of crime and building a legitimate future together. Since childhood, Sule has always been the dreamer who pulls Tommy toward bigger ideas, and the auto body shop symbolizes their bond, a concrete goal that would validate their friendship and hard work. However, the dream becomes corrupted as they slip deeper into drug dealing, and ultimately, Tommy must pursue this future without Sule.

Sule's betrayal stems from his desperation to protect himself when he was already involved in dealing harder drugs. Like Clay, Sule chose to sacrifice someone close to him, his best friend, to avoid the consequences of his own actions. His paranoia about finding the snitch and his escalating drug use reveal a man already trapped in a downward spiral, willing to sacrifice Tommy to save himself.

Before Tommy returns to custody, Sule hands him a note containing a phone number and apologizes for betraying him. The note represents Sule's final gesture of friendship despite his betrayal, he wants Tommy to have a way forward, a contact who might help. However, Tommy drops the note on his way out, symbolizing his decision to no longer rely on Sule or his criminal connections to build his future.

Tommy decides to use his time in prison to prepare for a legitimate future as a physics teacher. Rather than returning to the streets or relying on old connections, he chooses education and discipline as his path forward. Supported by Sina, Tommy is determined to build a life defined by stability and purpose rather than the chaos of his past.

Sule sees Tommy and Sina together at the cafe and becomes jealous and enraged that his best friend is moving on without him. His instability from drug use fuels the confrontation, and he instigates a fight that destroys the cafe. This incident leads to both Tommy and Sule violating their parole and facing trial again, forcing Tommy to once again choose between his friendship with Sule and his own freedom.

Tommy and Sule suspect Keiler, an aspiring rapper in their circle, because he is an outsider and their paranoia spreads among their friends. Keiler becomes a convenient target as the search for the snitch intensifies. However, the real revelation comes when Clay's backstory proves that snitches can come from within their closest group, leading Tommy to discover Sule's betrayal.