After about 2 hours and with the help of others... I finally got the son of a bitches across.

Cop & thief go
Cop comes back
Cop & boy go
Cop & Thief come back
Dad & son go
Dad comes back
Mom & Dad go
Mom comes back
Cop & thief go
Dad comes back
Mom & Dad go
Mom comes back
Mom & daughter go
Cop & thief come back
Cop & daughter go
Cop comes back
Cop & thief go