Hey everyone, My little brother has recently decided he wanted to get into home brewing. He bought this Northern Brewer Modelo de mayo cerveza lager kit. I made him a yeast starter of 1.040 OG with two wyeast 2124 bohemian lager smack packs, I was along with him as he brewed it trying to explain what he has to do with a lager after the fermentation period. We also hit the recommended gravity of 1.050. I am not sure where I went wrong explaining things to him but he decided to throw the primary fermenter into a fridge at 42 degrees three days into the fermentation period for about 20 hours. It was going along pretty good but seems to have stalled out. If I take it out of the fridge should I worry about infection or dead yeast?