http://www.ign.com/wikis/detroit-become-human/Spare_Parts
CONNOR AND HANK CLOSE IN
Control will switch over to Connor as he and Hank approach the abandoned house. Follow the path around the house towards the door. You can look inside through the window before the door to see Ralph standing by. Go inside the house and scan Ralph. Once you scan all three points on him, you’ll notice his stress level appear on the screen as you move around.
The source of the stress is where Kara and Alice are located, which will be under the staircase of the house. You can choose dialogue to tell Ralph as you’re searching, but once you find Kara’s location, Ralph will grab Connor as Kara runs off with Alice. Chase them out of the house and down the street.
THE CHASE
Start running down the street towards the marker on the screen. When you get there you’ll be directed by an officer another direction. Go to the next marker and Kara and Connor will meet. As Kara runs off, Connor will watch as they try to get across the highway.
You’ll control Kara next, as you try to make it across the street with Alice. Hit the prompts as they appear on the screen to help them avoid getting hit by the cars. You’ll switch back over to Connor and will be given a choice when Hank says to let them go.
You can either give up or go after Kara. If you choose to chase them, Connor will jump over the fence and try to cross the highway.
Hit all of the prompts you see as Connor chases Kara down. Control will again switch to Kara, with you having to hit more button prompts as they avoid obstacles in their way. Eventually, Connor grabs Kara and she will have to struggle to get away from him.
Hit and mash all the buttons that appear to fend Connor off. After this, Kara will disappear and Connor will have lost them, a short cutscene will play out and the chapter will end.
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