DEDHAM — A murder case against a Mansfield woman hasn’t even reached trial yet but lawyers on both sides battled Wednesday over evidence and about who killed her Boston police officer boyfriend.

Karen Read, 43, entered Dedham Superior Court for a packed pretrial hearing to cheers from supporters outside yelling “go Karen.” However, afterwards she let her lawyers do the talking and declined to answer questions from reporters.

David Linton may be reached at 508-236-0338.