A search of DynaMed and Joanna Briggs did not identify RCTs or other documents that referenced  RCTs evaluating family presence during resuscitation.

A PubMed search of resuscitation AND family – Filtered by Randomized Controlled Trial only identified one RCT.  Removing the filter and adding “randomized OR random” as search terms did not identify additional studies.
Family presence during cardiopulmonary resuscitation.
Jabre P, et al. N Engl J Med. 2013 Mar 14;368(11):1008-18. doi: 10.1056/NEJMoa1203366.
PMID: 23484827

Family presence during resuscitation: a randomised controlled trial of the impact of family presence. Holzhauser K; Finucane J; De Vries SM; Australasian Emergency Nursing Journal, 2006; 8 (4): 139-47.

There are also quasi-experimental studies included in these search results.