Laney says no more than 15mins, then she goes on to say juror arrived at 8.37 died at 9.13 which is more than 15 mins, and a lot less than 50 mins, if she was meant to say that, Kate confirms the 15 mins. Laney more likely should have said 8.57.
Lainie says she found cyanide in a time release capsule in the victim's stomach, then goes into great detail about how it wouldn't dissolve until it reached his intestines. Since he died from the poison in the capsule he took in the morning, there would be no traces of the capsule in his stomach since it had entered his intestines and dissolved away to release the cyanide.