Eric Delko, who had been close to Speedle, was still angry over his friend's murder, and often acted as though he regards Wolfe as an interloper. During Season 4, there was visible tension between the two, leading Valera to comment that they should go into a room and "beat each other up". From the following season onwards, they have put aside their differences and become close friends, though Eric occasionally seems to enjoy exercising his seniority by sending Ryan to do the dirtier work. In the episode Time Bomb, Ryan's home is searched for evidence linked to the murder of State Attorney Rebecca Nevins. After a loud argument with his fellow CSIs, Ryan gets escorted back to the police station, where he is questioned by Stetler and is taken to jail for allegedly hiding stolen diamonds which Eric found. He arrests Stetler after Eric brings forth new evidence linking Stetler to the diamonds, thanking Eric for having his back. In several instances as the seasons progressed, they have showed deep respect and care for one another: Delko dangerously driving Ryan to the hospital, unaided, after he finds him shot by a nail gun, and Ryan lashing out angrily at the man who shot Eric and acting patiently and kindly when he returns to CSI and makes several rookie mistаkes.