Two Toronto police officers who fractured the ribs of a disabled man had no reasonable grounds to arrest him and are therefore guilty of assault, a prosecutor says.

Even if constables Edward Ing and John Cruz believed they were acting lawfully when they arrested the man on suspicion of being drunk in public, they are still guilty, Philip Perlmutter told a judge Thursday in making his final arguments.

Ing and Cruz are charged with assault causing bodily harm after they arrested Richard Moore on the steps of his Gerrard Street East rooming house in 2009.

Moore, a 59-year-old former offset printer with several medical disabilities, bled profusely and suffered two rib fractures during the arrest. Tests showed he had no alcohol in his blood.